Answers
The density of the wooden cube is 0.638 g/cm³. The type of wood the cube is made of is ash.
How to find the density of object?The wooden cube has a edge length of 6 centimetres and a mass of 137.8 grams.
The density of the wood can be calculated as follows:
density = mass / volume
volume of the wood = l³
where
l = lengthTherefore,
volume of the wood = 6³
volume of the wood = 216 cm³
density of the wood = 137.8 / 216
density of the wood = 0.63796296296
density of the wood = 0.638 g/cm³
Therefore, the cube wood is made of ash.
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Related Questions
In QRS, the measure of angle S=90°, the measure of angle Q=6°, and RS = 20 feet. Find the
length of SQ to the nearest tenth of a foot.
R
20
6°
s
Q
X
Answers
The length of SQ in triangle QRS is approximately 19.8 feet to the nearest tenth of a foot.
To find the length of SQ in triangle QRS, where angle S = 90°, angle Q = 6°, and RS = 20 feet, we can use the sine function. Here's a step-by-step explanation:
1. Identify the given information: In triangle QRS, we have angle S = 90°, angle Q = 6°, and side RS = 20 feet.
2. Since the sum of angles in a triangle is always 180°, we can find angle R: angle R = 180° - angle S - angle Q = 180° - 90° - 6° = 84°.
3. Now we can use the sine function to find the length of side SQ. Since we know angle R and side RS, we can use the sine of angle R to relate side SQ to side RS:
[tex]sin(angle R) = \frac{opposite side (SQ)}{ hypotenuse side (RS)}[/tex]
[tex]sin(84°) =\frac{SQ}{20 feet}[/tex]
4. Solve for SQ: [tex]SQ = (20 feet) sin(84°) = 19.8 feet.[/tex].
So, the length of SQ in triangle QRS is approximately 19.8 feet to the nearest tenth of a foot.
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An agricultural scientist collected data to study the relationship between the amount of nitrogen added to a comfield and the number of
bushels of com produced. This is the regression line of the data, where y is measured in bushes and is measured in pounds of nitrogen
0. 43
What is the meaning of the intercept of the regression line?
O A When no nitrogen is added to the field, 28. 7 bushels of corn are produced
When 28. 7 pounds of nitrogen is added to the held, no bushels of corn are produced
When 0. 43 pounds of nitrogen is added to the field. 28. 7 bushels of corn are produced
B. When 38. 7 pounds of nitrogen is added to the field, 0. 43 bushels of com are produced
Answers
The meaning of the intercept of the regression line is option B- When 38. 7 pounds of nitrogen is added to the field, 0. 43 bushels of com are produced
We are given the equation of the experiment that tells a relationship.
y = 0.43x + 28.5
The linear regression line is an algebraic model to show the relationship between the two models by putting the value of one variable to get the value of the other.
A linear regression line can be represented as,
y = Ax + B
Here y is the dependent variable and x is the explanatory variable. A is the slope of the line and
B is the intercept here. In the given equation there are two variables given.
Variable x representsthe amount of nitrogen added, and the variable y represents the number of bushels of corn produced.
As putting the value of x, y increases with the value of number 0.43. Therefore, as we are increasing the value of the nitrogen by one unit, the number of bushels of corn produced is increasing by 0.43 units. Hence, for every 1 pound of nitrogen added to the field, the amount of corn yielded increases by 0.43 bushels.
Therefore option B is the correct option.
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The complete question is "An agricultural scientist collected data to study the relationship between the amount of nitrogen added to a cornfield and the number of
bushels of corn produced. This is the regression line of the data, where y is measured in bushels of corn and x is measured in pounds of
nitrogen.
y = 0.43x + 28.5
What is the meaning of the slope of the regression line?
O A. For every 0.43 pounds of nitrogen added to the field, the amount of corn yielded increases by 28.5 bushels.
OB. For every 1 pound of nitrogen added to the field, the amount of corn yielded increases by 0.43 bushels.
OC. For every 1 pound of nitrogen added to the field, the amount of corn yielded increases by 28.5 bushels.
OD. For every 28.5 pounds of nitrogen added to the field, the amount of corn yielded increases by 0.43 bushels."
Hannah has an offer from a credit card issuer for 0% APR for the first 30 days
and 12. 22% APR afterwards, compounded daily. What effective interest rate
is Hannah being offered?
Answers
To find the effective interest rate that Hannah is being offered, we need to take into account the compounding period, which is daily in this case. The effective annual interest rate (EAR) can be calculated using the formula:
EAR = (1 + APR/n)^n - 1
where APR is the annual percentage rate, and n is the number of compounding periods per year.
For the first 30 days, Hannah is offered a 0% APR, so the EAR for this period is simply 0.
After 30 days, Hannah is offered a 12.22% APR compounded daily, which means that there are 365 compounding periods per year. Therefore, the EAR for this period can be calculated as follows:
EAR = (1 + 0.1222/365)^365 - 1
≈ 0.1267
So the effective interest rate that Hannah is being offered is approximately 12.67%.
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Find an equivalent expression for the missing side length of the rectangle.
then find the missing side length when x = 3. round to the nearest tenth of
an inch.
8x in.
2x in.
? in.
expression: 4
length:
6
in.
answer 1:
4
answer 2:
6
Answers
The missing side length of the rectangle is 7.75 inches when x is equal to 3. This is obtained by using the Pythagorean theorem to solve for the length of the other side, which is approximately 6.3 inches.
Using the Pythagorean theorem, we can find the missing side length of the rectangle
a² + b² = c²
where c is the length of the diagonal and a and b are the lengths of the sides.
Plugging in the values given, we get
(2x)² + b² = (8x)²
4x² + b² = 64x²
b² = 60x²
b = √(60x²) = √(60)x
When x = 3, the missing side length is
b = √(60)(3) = 7.75 in. (rounded to the nearest tenth of an inch)
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--The given question is incomplete, the complete question is given
"Find an equivalent expression for the missing side length of the rectangle.
then find the missing side length when x = 3. round to the nearest tenth of an inch.
8x in. is a diagonal of rectangle
2x in. is one side of rectangle
? in. is other side at base "--
A particle moves on a coordinate line with acceleration d²s/dt = 30 sqrt(t) – 12/ sqrt(t) subject to the conditions that ds/dt = 12 and s = 16 when t= 1. Find the velocity v = ds/dt in terms of t and the position.
The velocity v = ds/dt in terms of t is v =
Answers
The velocity v = ds/dt in terms of t and the position s is: [tex]v = 15t^{(3/2)} - 8t^{(1/2)} + 6[/tex] and [tex]s = 5t^{(5/2)} - 16t^{(3/2)} + 6t + 27[/tex] respectively.
To find the velocity v = ds/dt in terms of t and the position s, we first need to integrate the acceleration equation with respect to time to get the velocity equation:
d²s/dt² = 30 sqrt(t) – 12/ sqrt(t)
Integrating both sides with respect to t, we get:
ds/dt = 30/2 * t^(3/2) - 12 * 2/3 * t^(1/2) + C₁
where C₁ is the constant of integration.
Using the condition ds/dt = 12 when t = 1, we can solve for C₁:
12 = 30/2 * 1^(3/2) - 12 * 2/3 * 1^(1/2) + C₁
C₁ = 6
Substituting this value of C₁ back into the velocity equation, we get:
ds/dt = 15t^(3/2) - 8t^(1/2) + 6
Now, we can integrate the velocity equation to get the position equation:
s = 5t^(5/2) - 16t^(3/2) + 6t + C₂
where C₂ is the constant of integration.
Using the condition s = 16 when t = 1, we can solve for C₂:
16 = 51^(5/2) - 161^(3/2) + 6*1 + C₂
C₂ = 27
Substituting this value of C₂ back into the position equation, we get:
s = 5t^(5/2) - 16t^(3/2) + 6t + 27
Therefore, the velocity v = ds/dt in terms of t and the position s is: v = 15t^(3/2) - 8t^(1/2) + 6 and s = 5t^(5/2) - 16t^(3/2) + 6t + 27 respectively.
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2
How much water will a cone hold that has a diameter of 6 inches and a height of 21 inches.
Use 3. 14 for 7 and round your answer to the nearest whole number.
A 66 cubic inches
B 198 cubic inches
C) 594 cubic inches
D 2374 cubic inches
Answers
The cone will hold approximately 198 cubic inches of water. The correct answer is option B.
To find how much water a cone with a diameter of 6 inches and a height of 21 inches will hold, we need to calculate the volume of the cone. We can use the formula for the volume of a cone: V = (1/3)πr^2h, where V is the volume, r is the radius, and h is the height.
1. Since the diameter is 6 inches, the radius (r) is half of that: r = 6/2 = 3 inches.
2. The height (h) is given as 21 inches.
3. Use 3.14 for π.
Now, plug the values into the formula:
V = (1/3) * 3.14 * (3^2) * 21
4. Calculate the square of the radius: 3^2 = 9
5. Multiply the values: (1/3) * 3.14 * 9 * 21 ≈ 197.64
6. Round the answer to the nearest whole number: 198 cubic inches.
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An athlete runs around a rectangular housing estate 10 times. The estate is 1.08 km by 420 m. How far has the athlete run?
Answers
30 km far has the athlete run.
A rectangle may be a geometric shape that is characterized by its four sides, where opposite sides are parallel and break even within the length. It has four sides the longer side is named length and the shorter side is named as breadth.
An Athlete runs around a rectangular field = 10 times
The Length of the rectangle = [tex]1.08 km[/tex]
The Breadth of the rectangle = [tex]0.42 km[/tex]
[tex]1km = 1000 m\\= 420 /1000 m\\= 0.42 km[/tex]
Therefore, perimeter of the rectangle = 2 (length + breadth)
= [tex]2 ( 1.08 + 0.42)[/tex]
= [tex]2 (1. 50)[/tex]
= [tex]3 km[/tex]
So, the athlete runs around a rectangular housing 10 times = [tex]3[/tex]×[tex]10[/tex]
= [tex]30 km[/tex]
Therefore, the athlete runs 30 km far.
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A segment with endpoints A (4, 2) and C (1,5) is partitioned by a point B such that AB and BC form a 1:3 ratio. Find B.
O (1, 2. 5)
O (2. 5, 3. 5)
O (3. 25, 2. 75)
O (3. 75, 4. 5)
Answers
The answer is (3.25, 2.75)
To find point B, we can use the fact that AB and BC form a 1:3 ratio. Let's start by finding the coordinates of point B.
First, we need to find the distance between A and C. We can use the distance formula for this:
[tex]d = \sqrt{ ((x2 - x1)^2 + (y2 - y1)^2)[/tex]
where [tex](x1, y1) = (4, 2)[/tex] and [tex](x2, y2) = (1, 5)[/tex]
[tex]d = \sqrt{((1 - 4)^2 + (5 - 2)^2)} = \sqrt{(9 + 9)} = \sqrt{(18)}[/tex]
Next, we need to find the distance between A and B, which we'll call x, and the distance between B and C, which we'll call 3x (since AB and BC are in a 1:3 ratio).
Using the distance formula for AB:
[tex]x = \sqrt{\\((x2 - x1)^2 + (y2 - y1)^2)[/tex]
where [tex](x1, y1) = (4, 2)[/tex] and [tex](x2, y2) = (Bx, By)[/tex]
[tex]x = \sqrt{((Bx - 4)^2 + (By - 2)^2)[/tex]
Using the distance formula for BC:
[tex]3x = \sqrt{((x2 - x1)^2 + (y2 - y1)^2)[/tex]
where [tex](x1, y1) = (1, 5)[/tex] and [tex](x2, y2) = (Bx, By)[/tex]
[tex]3x = \sqrt{((Bx - 1)^2 + (By - 5)^2)[/tex]
Now we can set up an equation using the fact that AB and BC are in a 1:3 ratio:
[tex]x / 3x = 1 / 4[/tex]
Simplifying this equation, we get:
[tex]4x = 3(AB)[/tex]
[tex]4x = 3\sqrt{((Bx - 4)^2 + (By - 2)^2)[/tex]
And
[tex]9x = \sqrt{((Bx - 1)^2 + (By - 5)^2)[/tex]
Now we have two equations and two unknowns (Bx and By). We can solve for Bx in the first equation and substitute into the second equation:
[tex]Bx = (3\sqrt{((Bx - 4)^2 + (By - 2)^2))} / 4[/tex]
[tex]9x = \sqrt{((Bx - 1)^2 + (By - 5)^2)[/tex]
[tex]81((Bx - 4)^2 + (By - 2)^2) / 16 = (Bx - 1)^2 + (By - 5)^2[/tex]
Expanding the squares and simplifying, we get:
[tex]81Bx^2 - 648Bx + 1245 = 16Bx^2 - 32Bx + 266[/tex]
[tex]65Bx^2 - 616Bx + 979 = 0[/tex]
Using the quadratic formula, we get:
[tex]Bx = (616 ± \sqrt{(616^2 - 4(65)(979)))} / (2(65))[/tex]
[tex]Bx = (616 ± \sqrt{(223456))} / 130[/tex]
[tex]Bx = 3.25[/tex] or [tex]Bx = 10.2[/tex]
We can eliminate the solution Bx ≈ 10.2 because it is outside the segment AC. Therefore, the solution is:
B = (3.25, 2.75)
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An oil globe made of hand blown glass of a diameter 22.6.what is the volume of globe.
Answers
If An oil globe made of hand-blown glass of a diameter of 22.6. Therefore, the volume of the oil globe is approximately 5704.8 cm^3.
The volume of a spherical object can be calculated using the formula:
V = (4/3)πr^3
where V is the volume, π is the mathematical constant pi (approximately equal to 3.14159), and r is the radius of the sphere.
In this case, we are given the diameter of the oil globe, which is 22.6. The radius is half of the diameter, so we can calculate the radius as:
r = d/2 = 22.6/2 = 11.3 cm
Substituting this value of radius in the formula for the volume of a sphere, we get:
V = (4/3)π(11.3)^3
V = 5704.8 cm^3 (rounded to one decimal place)
Therefore, the volume of the oil globe is approximately 5704.8 cm^3.
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Find the missing number so that the equation has infinitely many solutions.
-5x +_____= -5x − 7
Answers
Starting with -5x + __ = -5x - 7, we can simplify the left-hand side by subtracting the -5x from both sides:
-5x + __ -(5x) = -5x - 7 - (-5x)
Simplify further, we get:
__ = -7
So the missing number is -7, and the equation is -5x - 7 = -5x - 7, which is an identity and has infinitely many solutions.
identify the inequalities for which the ordered pair (-1,-9) is a solution. Option C is y> -5/4x-3
Answers
The inequalities for which the ordered pair (-1,-9) is a solution are a and b
Identifying the ordered pairs of the inequality expressionFrom the question, we have the following parameters that can be used in our computation:
The inequality expression y> -5/4x-3 and the list of options
To determine the ordered pairs of the inequality expression, we set x = -1 and then calculate the value of y
Using the above as a guide, we have the following:
y > -5/4(-1) -3
Evauate
y > -1.75 -- this is false because -9 < -1.75
For the list of options, we have
Graph (a) True
Graph (b) True
Hence, the inequalities for which the ordered pair (-1,-9) is a solution are a and b
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Heather says that the ratio of bass and violins to cellos is 10 to 5. Allen says the ratio of cellos to bass and violins is 1 to 2. Who is correct?explain your answer
Answers
Both ratios provided by Heather and Allen are correct, they are just inverse.
Heather says that the ratio of bass and violins to cellos is 10 to 5. Allen says the ratio of cellos to bass and violins is 1 to 2. To determine who is correct, let's compare the ratios.
1: Simplify Heather's ratio.
Heather's ratio is 10:5, which can be simplified by dividing both sides by 5. This gives a simplified ratio of 2:1 (bass and violins to cellos).
2: Compare the simplified ratios.
Heather's simplified ratio is 2:1, which represents the ratio of bass and violins to cellos. Allen's ratio is 1:2, which represents the ratio of cellos to bass and violins.
3: Analyze the results.
Heather's ratio (2:1) and Allen's ratio (1:2) are inverses of each other. Both ratios are correct, but they represent different perspectives: Heather is expressing the ratio of bass and violins to cellos, while Allen is expressing the ratio of cellos to bass and violins.
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a consumer activist decides to test the authenticity of the claim. she follows the progress of 20 women who recently joined the weight-reduction program. she calculates the mean weight loss of these participants as 14.8 pounds with a standard deviation of 2.6 pounds. the test statistic for this hypothesis would be
Answers
The test statistic for the hypothesis about a consumer activist decides to test the authenticity of the claim is t = 1.38.
In a hypothesis test, a test statistic—a random variable—is computed from sample data. To decide whether to reject the null hypothesis, you can utilise test statistics. Your results are compared to what would be anticipated under the null hypothesis by the test statistic. The p-value is computed using the test statistic.
A test statistic gauges how closely a sample of data agrees with the null hypothesis. Its observed value fluctuates arbitrarily from one random sample to another. When choosing whether to reject the null hypothesis, a test statistic includes information about the data that is important to consider. The null distribution is the sample distribution of the test statistic for the null hypothesis.
Sample size, n = 20
Sample mean, x = 14.8 pounds
Sample standard deviation, s = 2.6
The null hypothesis is,
[tex]H_o[/tex]: μ ≤ 14
The alternative hypothesis is,
[tex]H_a[/tex] : μ > 14
t-test statistic is defined as:
[tex]t = \frac{x - \mu}{\frac{s}{\sqrt{n} } }[/tex]
[tex]= \frac{14.8 - 14}{\frac{2.6}{\sqrt{20} } }[/tex]
= [tex]\frac{0.8}{0.581}[/tex]
= 1.377
t = 1.38.
Therefore, the test statistic for the hypothesis is 1.38.
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Complete question"
An advertisement for a popular weight-loss clinic suggests that participants in its new diet program lose, on average, more than 14 pounds. A consumer activist decides to test the authenticity of the claim. She follows the progress of 20 women who recently joined the weight-reduction program. She calculates the mean weight loss of these participants as 14.8 pounds with a standard deviation of 2.6 pounds. The test statistic for this hypothesis would be Multiple Choice -1.38 1.38 1.70 -1.70 O O
At one of new york’s traffic signals, if more than 17 cars are held up at the intersection, a traffic officer will intervene and direct the traffic. the hourly traffic pattern from 12:00 p.m. to 10:00 p.m. mimics the random numbers generated between 5 and 25. (this holds true if there are no external factors such as accidents or car breakdowns.) scenario hour number of cars held up at intersection a noon−1:00 p.m. 16 b 1:00−2:00 p.m. 24 c 2:00−3:00 p.m. 6 d 3:00−4:00 p.m. 21 e 4:00−5:00 p.m. 15 f 5:00−6:00 p.m. 24 g 6:00−7:00 p.m. 9 h 7:00−8:00 p.m. 9 i 8:00−9:00 p.m. 9 based on the data in the table, what is the random variable in this scenario? a. the time interval between two red lights b. the number of traffic accidents that occur at the intersection c. the number of times a traffic officer monitors the signal d. the number of cars held up at the intersection
Answers
The random variable in this scenario is the number of cars held up at the intersection (option d).
The data provided in the table shows the number of cars held up at the intersection during specific time intervals, ranging from 12:00 p.m. to 9:00 p.m. Based on this information, it is clear that the random variable in this scenario is the number of cars held up at the intersection.
To put it in mathematical terms, let X be the random variable representing the number of cars held up at the intersection during a specific time interval. The data provided in the table represents a sample of X, with each time interval being a different observation. The values of X can range from 0 to 25, with 17 being the threshold for intervention by a traffic officer.
Therefore, the answer to the question is d. the number of cars held up at the intersection. It is important to note that this random variable is discrete, as it takes on specific integer values.
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Please please help ASAP. See photo below
Central / Inscribed Angles (Algebraic)
Answers
The calculated value of x in the circle is 12.3
Calculating the value of x in the circleFrom the question, we have the following parameters that can be used in our computation:
The circle
∠QRS = 7x - 21
QS = 130
Using the theorem of intersecting chords, we have the following equation
∠QRS = 1/2 * QS
Substitute the known values in the above equation, so, we have the following representation
7x - 21 = 1/2 * 130
Evaluate
7x - 21 = 65
Evaluate the like terms
7x = 86
Divide by 7
x = 12.3
Hence, the value of x in the circle is 12.3
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the figure is the base
Answers
The Volume and the surface area of the given figure are 87 in³ and 83 in²
To find the volume of the figure, we need to split it into smaller rectangular parts and find the volume of each part separately. From the given measurements, we can see that the figure consists of three rectangular parts:
The volume of each part can be found using the formula:
Volume = length x width x height
Part 1: A rectangular prism with dimensions 3 in x 3 in x 1 in
Volume = 3 in x 3 in x 1 in
Volume = 9 in³
Part 2: A rectangular prism with dimensions 1 in x 6 in x 7 in
Volume = 1 in x 6 in x 7 in
Volume = 42 in³
Part 3: A rectangular prism with dimensions 6 in x 6 in x 1 in
Volume = 6 in x 6 in x 1 in
Volume = 36 in³
Total Volume:
The total volume of the piecewise rectangular figure is the sum of the volumes of each part:
Total Volume = Volume of Part 1 + Volume of Part 2 + Volume of Part 3
= 9 in³ + 42 in³ + 36 in³
= 87 in³
To find the surface area of the figure, we need to find the area of each face and add them up. The figure has 6 rectangular faces, and the area of each face can be found using the formula:
Area = length x width
Part 1:
Top and Bottom faces:
Area = 3 in x 3 in
Area = 9 in²
Side faces:
Area = 3 in x 1 in
Area = 3 in² (x2)
Total Area of Part 1:
Total Area = 9 in² + (3 in² x 2)
= 15 in²
Part 2:
Top and Bottom faces:
Area = 1 in x 6 in
Area = 6 in²
Side faces:
Area = 1 in x 7 in
Area = 7 in² (x2)
Total Area of Part 2:
Total Area = 6 in² + (7 in² x 2)
= 20 in²
Part 3:
Top and Bottom faces:
Area = 6 in x 6 in
Area = 36 in²
Side faces:
Area = 6 in x 1 in
Area = 6 in² (x2)
Total Area of Part 3:
Total Area = 36 in² + (6 in² x 2)
= 48 in²
Total Surface Area:
The total surface area of the figure is the sum of the areas of all its faces:
Total Surface Area = Total Area of Part 1 + Total Area of Part 2 + Total Area of Part 3
= 15 in² + 20 in² + 48 in²
= 83 in²
The Volume and the surface area of the given figure are 87 in³ and 83 in²
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HELP ASAP PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Challenge: Six different names were put into a hat. A name is chosen 100 times and the name Fred is chosen 11 times. What is the experimental probability of the name Fred beingâ chosen? What is the theoretical probability of the name Fred beingâ chosen? Use pencil and paper. Explain how each probability would change if the number of names in the hat were different.
The experimental probability of choosing the name Fred is nothing.
=============
The theoretical probability of choosing the name Fred is nothing
Answers
The experimental and theoretical probability of the name Fred being chosen is 0.11 and 0.167 respectively.
The question is asking for the experimental and theoretical probabilities of choosing the name Fred when six different names are put into a hat and a name is chosen 100 times.
To find the experimental probability of choosing the name Fred, divide the number of times Fred is chosen by the total number of trials (100 times). In this case, Fred is chosen 11 times.
Experimental probability of choosing Fred = (number of times Fred is chosen) / (total number of trials)
= 11 / 100
= 0.11 or 11%
For the theoretical probability, since there are six different names in the hat and each name has an equal chance of being chosen, the probability of choosing Fred is:
Theoretical probability of choosing Fred = 1 / 6
≈ 0.167 or 16.67%
If the number of names in the hat were different, the theoretical probability would change because the denominator (total number of names) would be different. For example, if there were 5 names instead of 6, the theoretical probability of choosing Fred would be 1/5 or 20%.
The experimental probability would also likely change since the outcomes of the trials would be different with a different number of names.
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"When a contractor paints a square surface that has a side length of x feet, he needs to know the area of the surface in order to buy the correct amount of paint. Since the contractor always adds 25 square feet to the area, he buys extra paint. Which function can be used to find the totall area in square feet, Ax , that the contractor will use to determine how much paint he needs to buy?
Answers
The function that can be used to find the total area is: (x^2 + 25) sq. ft.
What is a square?A square is a type of quadrilateral which has an equal length of sides. So then its area can be calculated as;
area of a square = length x length
We have from the question that; a square surface that has a side length of x feet. So that;
area of the square surface = length * length
= x * x
= x^2 square feet
But since the contractor always adds 25 square feet to the area, he buys extra paint, then the function required is:
total area = (x^2 + 25) sq. ft.
The function is (x^2 + 25) sq. ft.
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Answer:
A(x) = x² + 25----------------------
In order to find the total area, we need to consider both the area of the square surface and the extra paint he always adds.
Find the area of the square surface:
A = x² (since the side length is x feet)Add the extra 25 square feet of paint:
A(x) = A + 25Combining these steps, the function is:
A(x) = x² + 25In triangle ABC, A is (0,0), B is (0,,3) and C is (3,0). What type of triangle is ABC? SELECT ALL THAT APPLY
Answers
The triangle has two sides with equal lengths (AB and AC) and one side with a different length (BC). This makes it an isosceles triangle.
How to find the type of triangle
Triangle ABC has vertices A(0,0), B(0,3), and C(3,0).
To determine the type of triangle, we can find the lengths of the sides using the distance formula:
AB = sqrt((0-0)^2 + (3-0)^2) = sqrt(0 + 9) = 3
BC = sqrt((3-0)^2 + (0-3)^2) = sqrt(9 + 9) = sqrt(18) = 3√2
AC = sqrt((3-0)^2 + (0-0)^2) = sqrt(9 + 0) = 3
The triangle has two sides with equal lengths (AB and AC) and one side with a different length (BC). This makes it an isosceles triangle.
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You work at Dave's Donut Shop. Dave has asked you to determine how much each box of a dozen donuts should cost. There are 12 donuts in one dozen. You determine that it costs $0.27 to make each donut. Each box costs $0.16 per square foot of cardboard. There are 144 square inches in 1 square foot.
Answers
Using mathematical operations, each box of a dozen donuts should cost $3.40.
What are the mathematical operations?The basic mathematical operations used to determine the cost of a dozen donuts include multiplication and addition.
Firstly, the total cost of 12 donuts is computed by multiplication, while the total cost of the donuts per box (including the cost of the box) is obtained by addition.
1 dozen = 12 donuts
The cost unit of a donut = $0.27
The total cost of donuts = $3.24 ($0.27 x 12)
The cost per square foot of cardboard = $0.16
The total cost of a dozen donuts and the box = $3.40 ($3.24 + $0.16)
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If John gives Sally $5, Sally will have twice the amount of money that John will have. Originally, there was a total of $30 between the two of them. How much money did John initially have?
A) 25
B) 21
C) 18
D) 15
Answers
Answer:
25
Step-by-step explanation:
let x = the amount of money that shelly has.
let y = the amount of money that john has.
if shelly give john 5 dollars, then they both have the same amount of money.
this leads to the equation:
x-5 = y+5
if john give shelly 5 dollars, then shelly has twice as much money as john has.
this leads to the equation:
x+5 = 2(y-5)
solve for x in each equation to get:
x-5 = y+5 leads to:
x = y+10
x+5 = 2(y-5) leads to:
x+5 = 2y-10 which becomes:
x = 2y-15
you have 2 expressions that are equal to x.
they are:
x = y+10
x = 2y-15
you can set these expressions equal to each other to get:
y+10 = 2y-15
subtract y from both sides of this equation and add 15 to both sides of this equation to get:
y = 25
since x = 2y-15, this leads to:
x = 2(25)-15 which becomes:
x = 35
the equation x = y + 10 leads to the same answer of:
y =35
you have:
x = 25
y = 35
Question content area top
Part 1
Sandra
biked
700
meters
on Friday. On Saturday,
she
biked
4
kilometers. On Sunday,
she
biked
2
kilometers,
600
meters. How many
kilometers
did
Sandra
bike over the three days
Answers
1.3 meters
A cell phone leans against a wall. The bottom of the phone is 4 inches from the base of the wall, and the top of the phone makes an angle of 52 degrees with the wall. Find the length, x, of the phone so you can buy a new case. Round to the nearest hundreths place
Answers
The length of the phone is approximately 6.08 inches, so you can buy a case that fits this size.
To find the length, x, of the phone, we can use trigonometry. We know that the bottom of the phone is 4 inches from the base of the wall, so we can use the tangent function to find the length of the phone.
tangent(52 degrees) = opposite/adjacent
The opposite side is x (the length of the phone) and the adjacent side is 4 inches.
So,
tangent(52 degrees) = x/4
Multiplying both sides by 4, we get:
4 * tangent(52 degrees) = x
Using a calculator, we find that:
x ≈ 6.08 inches
Therefore, the length of the phone is approximately 6.08 inches, so you can buy a case that fits this size.
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What is the total surface area of a cylinder with a base
diameter of 9 inches and a height of 6 inches? (use 3.14 for
ti)
Answers
Answer:
423.9
Step-by-step explanation:
To solve this problem you need to use the formula for surface area. This formula can either be used with the radius or the diameter. I prefer using diameter because it is easier to remember and it is easier to calculate. The formula writes as follows: [tex]SA=d\pi h+d\pi ^{2}\\\\[/tex]. To use this formula all we have to do is insert the values into the formula and solve.
[tex]SA=d\pi h+d\pi ^{2}\\\\SA=(9)\pi(6)+\pi(9) ^{2}\\\\SA=54\pi+81\pi\\\\SA=54\pi+81\pi\\\\SA=135\pi\\\\SA=423.9[/tex]
423.9 is our answer.
Mariah is training for a sprint distance triathlon. She plans on cycling from her house to the library, shown on the grid with a scale in miles. If the cycling portion of the triathlon is 12 miles, will mariah have cycled at least 2/3 of that distance during her bike ride?
Answers
Mariah cycles a distance of 8.6 miles, which is more than 8 miles, hence more than 2/3 of the cycling portion of the triathlon.
What is a triathlon?A triathlon is described as an endurance multisport race consisting of swimming, cycling, and running over various distances.
The coordinates are given as follows:
Library (4,9).Mariah's House: (9, 2).Suppose that we have two points, and . The distance between them is given by:
distance = √(x2 - x1)² + (y2-y1)²
We substitute in the equation
Hence the distance between her house and the library is:
D = 8.6 miles.
She cycles a distance of 8.6 miles, which is more than 8 miles, hence more than 2/3 of the cycling portion of the triathlon.
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A group of friends Anna (A), Bjorn (B), Candice (C), David (D) and Ellen (E) want to enter a basketball contest that caters for teams of different sizes. A team with n players is called an n-team. A player can be in several different teams, including teams of the same size. There is a restriction however: players in a 2-team cannot play together in any larger team. For example, if friends A,B,C,D form the teams AB, BCD, ACD, then they cannot also form the teams BD or ABC, among others.
a) List all different 3-teams that the friends could enter.
b) What is the maximum number of teams that the friends can enter if they want to include exactly two 3-teams and at least one 2-team, but no other size teams.
c) What is the maximum number of teams that the friends can enter if they want to include exactly three 3-teams and at least one 2-team, but not other size teams.
d) The five friends want to enter 8 teams including at least one 2-team and at least one 3-team and no team of any other size. Find three ways of doing this with a different number of 3-teams in each case
Answers
The number of 3-teams is different, and there is at least one 2-team and one 3-team, fulfilling the requirements.
a) To list all different 3-teams that the friends (A, B, C, D, E) could enter, we can find all the possible combinations of choosing 3 friends out of 5. These combinations are:
1. ABC
2. ABD
3. ABE
4. ACD
5. ACE
6. ADE
7. BCD
8. BCE
9. BDE
10. CDE
b) To maximize the number of teams with exactly two 3-teams and at least one 2-team, we can form the following teams:
1. ABC (3-team)
2. ADE (3-team)
3. BC (2-team)
Here, we have formed 1 two-team and 2 three-teams.
c) To maximize the number of teams with exactly three 3-teams and at least one 2-team, we can form the following teams:
1. ABC (3-team)
2. ADE (3-team)
3. BCE (3-team)
4. CD (2-team)
Here, we have formed 1 two-team and 3 three-teams.
d) The friends want to enter 8 teams, including at least one 2-team and at least one 3-team. We can find three ways of doing this with a different number of 3-teams in each case:
1. Two 3-teams: ABC, ADE (3-teams); BC, BD, BE, CD, CE, DE (2-teams)
2. Three 3-teams: ABC, ADE, BCE (3-teams); AC, AD, AE, BD, BE, CD (2-teams)
3. Four 3-teams: ABC, ADE, BCE, BCD (3-teams); AB, AC, AD, AE (2-teams)
In each case, the number of 3-teams is different, and there is at least one 2-team and one 3-team, fulfilling the requirements.
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Solve the initial value problem t^2 dy/dt - t=1 + y + ty, y (1) = 8.
Answers
The solution of initial value problem, y = 9/t - 1, t ≠ 0.
We can begin by rearranging the equation and separating the variables:
t^2 dy/dt - yt = t + 1
dy/(y+1) = (t+1)/t^2 dt
Integrating both sides, we get:
ln|y+1| = -1/t + t/t + C
ln|y+1| = -1/t + C
|y+1| = e^C /t
Using the initial condition y(1) = 8, we can find the value of C:
|8+1| = e^C /1
e^C = 9
C = ln 9
Substituting back into the general solution, we have:
|y+1| = 9/t
We can now solve for y in terms of t:
y+1 = ±9/t
If we take the positive sign, we get:
y = 9/t - 1
If we take the negative sign, we get:
y = -9/t - 1
Thus, the general solution to the initial value problem is:
y = 9/t - 1 or y = -9/t - 1
Using the initial condition y(1) = 8, we can see that the correct solution is:
y = 9/t - 1
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Can someone please help me ASAP? It’s due tomorrow
Answers
The average human heart beats 1. 15*10^5 times a day
there are 3. 65*10^2 days in a year
how many times does the human heart beat in one year
write your answer in scientific notation
Answers
The human heart beats approximately 4.1975 x 10⁸ times in one year and it expressed in scientific notation.
According to the question, the average human heart beats 1.15 x 10⁵ times a day. We need to find out how many times the heart beats in one year, which is 3.65 x 10² days.
To calculate the total number of heartbeats in one year, we can multiply the number of heartbeats in a day by the number of days in a year. Therefore, we have:
Total number of heartbeats in one year = 1.15 x 10⁵ beats/day x 3.65 x 10² days/year
= (1.15 x 3.65) x (10⁵ x 10²) beats/year
= 4.1975 x 10⁸ beats/year
This number may seem large, but it is necessary for the heart to pump blood throughout the body to keep us alive and healthy.
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Suppose F(x, y) = (2y, - sin(y)) and C is the circle of radius 8 centered at the origin oriented counterclockwise. (a) Find a vector parametric equation rt) for the circle C that starts at the point (8, 0) and travels around the circle once counterclockwise for 0 ≤ t ≤ 2pi.
Answers
The vector parametric equation for the circle C is r(t) = <8cos(t), 8sin(t)> for 0 ≤ t ≤ 2π.
To find a vector parametric equation r(t) for the circle C with radius 8, centered at the origin, starting at the point (8, 0)
and traveling counterclockwise for 0 ≤ t ≤ 2π, follow these steps:
Write down the equation for the circle centered at the origin with radius 8:
x² + y² = 64.
Parametrize the circle using trigonometric functions.
Since we are starting at (8, 0) and going counter clockwise,
we can use x = 8cos(t) and y = 8sin(t).
Write the parametric equation in vector form:
r(t) = <8cos(t), 8sin(t)>.
So the vector parametric equation for the circle C is r(t) = <8cos(t), 8sin(t)> for 0 ≤ t ≤ 2π.
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