Rounding to three decimal places, the probability that exactly 7 Americans out of a sample of 15 own an answering machine is approximately 0.170.
To find the probability that exactly 7 of the 15 Americans selected at random own an answering machine, we can use the binomial distribution formula:
P(X = k) = (n choose k) * p^k * (1 - p)^(n - k)
where P(X = k) is the probability of getting exactly k successes, n is the sample size, p is the probability of success, and (n choose k) is the binomial coefficient which represents the number of ways to choose k successes out of n trials.
In this case, n = 15, p = 0.69 (the proportion of Americans who own an answering machine), and k = 7. Thus, the probability of getting exactly 7 Americans who own an answering machine out of a sample of 15 is:
P(X = 7) = (15 choose 7) * 0.69^7 * (1 - 0.69)^(15 - 7)
Using a calculator or statistical software, we can evaluate this expression to find:
P(X = 7) ≈ 0.170
This means that if we were to repeat this survey many times with samples of size 15, we would expect approximately 17% of the samples to have exactly 7 Americans who own an answering machine.
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A number divided by eight answers 27 remainders four whats the number
As per the query, we have to find a number which is divided by 8 that answers 27, i.e., quotient is 27, and remainder is 4. The number is 220.
In this case, we used it to find the number that was divided by 8 and gave a quotient of 27 and a remainder of 4. As we know the rule:
Dividend = Divisor × Quotient + Remainder
x = 8 × 27 + 4 x = 216 + 4 x = 220.
Hence, the number is 220.
The formula I used is called the division algorithm. It’s a way to divide two numbers and get a quotient and remainder. We can use this formula to solve other division problems with remainders as well.
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Translate the figure 5 units left and 5 units up. Plot all of the points of the translated figure. You may click a plotted point to delete it.
Answer:
Send a proper picture, the fifth point is not visible.
a right circular cylinder is generated by rotating a rectangle of perimeter p about one of its sides. what dimensions of the rectangle will generate the cylinder of max volume?
A right circular cylinder can be generated by rotating a rectangle of perimeter p about one of its sides. The dimensions of the rectangle that will generate the cylinder of max volume are l = p/6 and w = p/2 - l = 2p/3.
Explanation: Let l and w be the dimensions of the rectangle of perimeter p.
That is, the rectangle's perimeter is given by p = 2l + 2w or p/2 = l + w. Therefore, the width w = p/2 - l. The area of the rectangle is given by lw. When the rectangle is rotated around the side of length w, it generates a cylinder of height l and radius w.
The volume of the cylinder is given by V = πr²h = πw²l. Substituting w = p/2 - l, we obtain V = π(p/2 - l)²l = π(p/2)²l - 2π(p/2)l² + πl³.
The volume function can be obtained by differentiating V with respect to l, setting the derivative equal to 0, and solving for l. The derivative of V with respect to l is given by dV/dl = π(p/2)² - 4π(p/2)l + 3πl².
Setting dV/dl = 0 and solving for l, we obtain l = p/6.The dimensions of the rectangle that will generate the cylinder of max volume are l = p/6 and w = p/2 - l = 2p/3.
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It takes 2 ounces of paint to completely cover all 6 sides of a rectangular prism box, which holds 15 cups of sugar. Double the dimensions of the box. Hint: given k, areas are scaled by ____ and volumes are scaled by ____ Approximately how much paint would the new box need? How much sugar would it hold?
The new box would need approximately 8 ounces of paint and would hold 120 cups of sugar.
To find out how much paint the new box would need and how much sugar it would hold, follow these steps:
1. The original box holds 15 cups of sugar, and it takes 2 ounces of paint to cover it completely. When you double the dimensions of the box, areas are scaled by [tex]k^2[/tex] (k is the scale factor), and volumes are scaled by[tex]k^3.[/tex]
2. Since you double the dimensions, the scale factor k is 2.
3. The surface area of the box will be scaled by [tex]k^2, which is 2^2 = 4.[/tex]So, the new box will need 4 times the amount of paint that the original box needed. Since the original box needed 2 ounces of paint, the new box will need 2 × 4 = 8 ounces of paint.
4. The volume of the box will be scaled by [tex]k^3, which is 2^3 = 8[/tex]. So, the new box will hold 8 times the amount of sugar that the original box held. Since the original box held 15 cups of sugar, the new box will hold 15 × 8 = 120 cups of sugar.
In conclusion, the new box would need approximately 8 ounces of paint and would hold 120 cups of sugar.
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rotate 270 degrees…what are the coordinates of B
PLS HELP
Answer:
8;-2
Step-by-step explanation:
8 is the x axis and -2 is the y axis
Answer:
Step-by-step explanation:
help me please find the answer
In the given triangle, using angle bisectοr theοrem, the value οf the variable is 8.
What is triangle?A triangle is a pοlygοn with three edges and three vertices. It belοngs tο the basic geοmetric shapes. A triangle with the parts A, B, and C is referred tο as triangle ABC. Any three pοints that are nοt cοllinear in Euclidean geοmetry result in a separate triangle and a distinct plane.
What is angle bisectοr Theοrem?The angle bisectοr theοrem in mathematics is cοncerned with the prοpοrtiοns οf the twο segments that a line that bisects the οppοsite angle divides a triangle's side intο. It cοmpares their prοpοrtiοnal lengths tο the prοpοrtiοnal lengths οf the triangle's οther twο sides.
In the given triangle, using angle bisectοr Theοrem,
36/28 = q/(16-q)
On sοlving, we get
q = 9
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5. A-postage box should weigh 1.0 pound. If there is a 5% error on the weight, what is the range of acceptable weight ?
Answer:
0.95P - 1.05P
Step-by-step explanation:
Calculate the error
5% of 1.0 Pound
5/100 x 1.0 = 5/100
1/20 = 0.05
The error is + or - 0.05
If you add 0.05 to 1.0Pound, you get 1.05P
If you Subract 0.05 to 1.0Poumd, you get 0.95Pound
The weight will be between 0.95Pound and 1.05 Pound
Find the X
geometry
Considering the two secant theorem, the measure of the far arc x is given as follows:
x = 104º.
What is the secant-tangent theorem?The two secant theorem states that if two secant lines intersect outside a circle, then the measure of the angle of intersection of the two secant lines is obtained as the difference between the measure of the far arc and the measure of the near arc, divided by two.
Hence the equation to obtain the measure of the angle of intersection is given as follows:
y = (far arc - near arc)/2.
The parameters for this problem are given as follows:
Far arc = x.Near arc of 44º.Angle of intersection of y = 30º.Hence the measure of the far arc x is obtained as follows:
(x - 44)/2 = 30
x - 44 = 60
x = 44 + 60
x = 104º.
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suppose that at your favorite restaurant to-go orders arrive at the rate of 10 per hour. assume that the numbers of to-go orders on different hours are independent. the distribution of the average number of to-go orders per hour over 700 random hours is
By using Central Limit Theorem, the distribution of to-go orders per hour over 700 random hours at a restaurant with a rate of 10 per hour can be approximated by a normal distribution with a mean of 10 and a standard deviation of 0.119.
The distribution of the average number of to-go orders per hour over 700 random hours can be approximated by the Central Limit Theorem (CLT). In this case, the population mean (μ) is 10 to-go orders per hour, and the population standard deviation (σ) can be calculated using the Poisson distribution formula:
σ = sqrt(μ) = sqrt(10) ≈ 3.162
The sample size (n) is 700, which is larger than 30, so we can use the CLT to approximate the distribution of the sample means. The mean of the sample means is equal to the population mean, which is 10 to-go orders per hour. The standard deviation of the sample means (also called the standard error) is equal to:
SE = σ / sqrt(n) = 3.162 / sqrt(700) ≈ 0.119
Therefore, the distribution of the average number of to-go orders per hour over 700 random hours is approximately normal with a mean of 10 and a standard deviation of 0.119
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Work out m and c for the line: y = 5 − x
Answer:
m = -1, c = 5
Step-by-step explanation:
Provided in the attachment.
Find the slope of the line that passes through A(3 , 7) and B(2, 2).
Answer:
5
Step-by-step explanation:
To find the slope, we will use this equation.
[tex]\frac{y_{2} - y_{1} }{x_{2} - x_{1} } = m[/tex]
m = slope
When we plug in the values of y2, y1, x2, and x1, we get this:
[tex]\frac{2-7}{2-3} = m[/tex]
when we simplify:
[tex]\frac{-5}{-1}[/tex]
-5 / -1 = 5 / 1 = 5
The slope is 5.
Write an equation for line t. Show or explain how you determined your equation.
Enter your equation and your work or explanation in the box provided.
Answer:
[tex]y - 3 = \frac{2}{3} (x - 3)[/tex]
[tex]y = \frac{2}{3} x + 1[/tex]
[tex]2x - 3y = - 3[/tex]
Step-by-step explanation:
[tex]m = \frac{ - 5 - 3}{ - 9 - 3} = \frac{ - 8}{ - 12} = \frac{2}{3} [/tex]
[tex]y - 3 = \frac{2}{3} (x - 3)[/tex]
[tex]y - 3 = \frac{2}{3} x - 2[/tex]
[tex]y = \frac{2}{3} x + 1[/tex]
[tex]3y = 2x + 3[/tex]
[tex] - 2x + 3y = 3[/tex]
[tex]2x - 3y = - 3[/tex]
PLSSSS HELP IF YOU TURLY KNOW THISS
Given:-
[tex] \tt \: x - 5 = 2[/tex][tex] \: [/tex]
Solution:-
[tex] \tt \: x - 5 = 2[/tex][tex] \: [/tex]
[tex] \tt \: x = 2 + 5[/tex][tex] \: [/tex]
[tex] \boxed{ \tt{ \blue{ \: \: x = 7 \: \: }}}[/tex][tex] \: [/tex]
The value of x is 7 !
__________________
hope it helps ⸙
during an accident, skid marks may result from sudden breaking. the formula approximates a vehicle's speed, s, in miles per hour given the length d in feet of the skid marks. if skid marks on dry concrete are 54 feet long, how fast was the car traveling when the brakes were applied?
The car was travelling with the speed of 183.5 mph when the brakes were applied.
The pace at which an object travels a certain distance can be described using the speed formula. The distance that a body travels in a certain amount of time is a common way to measure speed. M/s is the SI unit of speed. We will learn more about the speed formula and its uses in this section.
Let's continue and investigate the speed formula in this part in more detail. Speed can be expressed in a variety of ways, including m/s, km/hr, miles/hr, etc. [LT-1] is the dimensional formula for speed. A body's speed may be defined as how quickly it is going. The equation for a given body's speed may be written as,
Speed = Distance ÷ Time
We have the equation,
[tex]s=\frac{\sqrt{d} }{0.04}[/tex]
we have the value of d as 54
putting the value pf d in the equation we get,
[tex]s=\frac{\sqrt{54} }{0.04}[/tex]
s = 7.34/0.04
s = 183.5 mph
So the car was travelling with the speed of 183.5 mph when the brakes were applied.
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Complete question:
The speed that a vehicle was traveling, s, in miles per hour, when the brakes were first applied, can be estimated using the formula
[tex]s=\frac{\sqrt{d} }{0.04}[/tex] where d is the length of the vehicle's skid marks, in feet.
if skid marks on dry concrete are 54 feet long, how fast was the car traveling when the brakes were applied?
HELPPPPP!!!!!!!!!!!!!
Answer:
Step-by-step
To make 100 to 250, you need to multiply 100 by 2.5 to make 250. In the similar way you need to multiply 80 by 2.5 which equals 200 which is the answer
Determine the value of X
Answer:
x = 26.
Step-by-step explanation:
Given: 2x + 3x + 50 = 180
First, write it down:
2x + 3x + 50 = 180
Then, collect like terms:
2x + 3x = 180 - 50
Then calculate:
5x = 130 (Divide both sides by 5)
x = 26
one side of a triangle is 5 and the altitude to that side is 12. another side of the triangle is 13. can you tell what the length of the altitude to that side of the triangle is? if not, why not? if so, show what it is.
12
Yes, it is possible to calculate the length of the altitude to the other side of the triangle. To do so, use the Pythagorean Theorem, which states that in a right triangle, the square of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides.
In this triangle, the hypotenuse is the side of length 13 and the other two sides are the side of length 5 and the altitude to it. So, the equation to use is:
132 = 52 + altitude2
Solving for altitude gives:
altitude2 = 132 - 52
altitude2 = 169 - 25
altitude2 = 144
altitude = √144 = 12
Therefore, the length of the altitude to the side of the triangle with length 13 is 12.
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help
asap please need this
Answer:
15 degrees,45 degrees, 120 degrees respectively
Step-by-step explanation: TO begin with total=1+3+8=12
1:3:8=12
1/12*180=15
3/12*180=45
8/12*180=120
Find CY on the triangle Geometry
The value of CY is 4.4
What are similar triangles?Two triangles are said to be similar if their corresponding angles are congruent and the corresponding sides are in proportion. The ratio of corresponding sides of similar triangles are equal.
Triangle ABC is similar to AXY
therefore,
represent CY is by x
9/9+4 = 10/(10+x)
= 9/13 = 10/10+x
= 13× 10 = 9( 10+x)
130 = 90 + 9x
9x = 130-90
9x = 40
x = 40/9
x = 4.44
therefore the value of CY is 4.44
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in bridge, south has 13 points and 3 clubs and bids 1 club. north responds with 3 clubs, what does that mean?
In the bridge, when the south has 13 points and 3 clubs and bids 1 club, the north responding with 3 clubs means that the North has a strong hand with six or more clubs.
In the game of bridge, bidding is a method of indicating the strength of a player's hand, which is the number of tricks that they believe they can win if they become the declarer. Every player has to declare their abilities based on the bid of the previous player when it is their turn to bid.
The bidding starts with the dealer and proceeds in a clockwise direction. The players can either make a bid or pass. The following are the four basic bids in Bridge:
When South has 13 points and 3 clubs, he makes a 1 Club bid. This bid can be interpreted as follows:
South has a strong hand with five or more clubs and 13 to 21 high card points. When South bids 1 Club, he implies that he has a balanced hand, which means that he has four cards in each suit, or an unbalanced hand, which means that he has a long suit, a singleton, or a void in some other suit.
When North responds with 3 Clubs, it means that he has a strong hand with six or more clubs. North has understood that South has five or more clubs and therefore responds with the number of clubs that he has in his hand to show that he is strong enough to support South's suit. Thus, North is trying to force South to become the declarer in clubs.
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ten families have an average of 2 children per family. if exactly two of these families are childless, what is the average number of children in the families with children? express your answer as a decimal to the nearest tenth.
Answer:
Step-by-step explanation:
If there are ten families and exactly two of them are childless, then there are 10 - 2 = 8 families with children.
The total number of children in these families is 8 x 2 = 16.
Therefore, the average number of children in the families with children is:
16 / 8 = 2
So the average number of children in the families with children is 2.0 (to the nearest tenth).
The average number of children in the families with children is 2.2.
To calculate this, first we need to determine the total number of children in the ten families. Since each family has an average of 2 children, this means that the total number of children in the ten families is 10 x 2 = 20.
Since two of these families are childless, this means that the total number of children in the remaining 8 families is 20 – 0 = 20.
Now, we need to determine the average number of children in the 8 families with children. To do this, we divide the total number of children (20) by the number of families with children (8):
20/8 = 2.5
Finally, we express the answer to the nearest tenth, which is 2.2.
In conclusion, the average number of children in the families with children is 2.2.
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A bank offers a CD that pays a simple interest rate of 11. 0%. How much must you put in this CD now in order to have $2500 for a home-entertainment center in 6 years. The present value that must be invested to get $2500 after 6 years at an interest rate of 11. 0% is $__?
The present value that must be invested to get $2500 after 6 years at a simple interest rate of 11.0% is $1509.64.
In this case, we know the final amount that we want to have after 6 years, which is $2500. We also know the interest rate, which is 11.0%. What we need to find is the principal amount, which is the present value that we must invest now to achieve the desired future value.
Using the formula for simple interest, we can rearrange it to solve for the principal:
Principal = Simple Interest / (Rate x Time)
We know that the simple interest is the difference between the final amount and the principal amount. Therefore, we can substitute the values into the formula:
$2500 - Principal = (Principal x 0.11 x 6)
Simplifying the equation, we get:
$2500 = Principal + (0.66 x Principal)
$2500 = 1.66 x Principal
Dividing both sides by 1.66, we get:
Principal = $1509.64
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Factor the expression 12x²+18x-12
(URGENT)
Answer:
6(2x - 1)(x + 2).
Step-by-step explanation:
12x²+18x-12
= 6(2x^2 + 3x - 2)
= 6 (2x - 1)(x + 2).
Write an equation to describe the relationship between t, the number of tickets, and c
, the total cost of tickets
The relationship between t, the number of tickets, and c, the total cost of tickets is: c = 55t
Relation between two variables, i.e, total cost and number of tickets:
The statistical relationship between two variables is called their correlation. The correlation can be positive, which means that the two variables move in the same direction, or negative, which means that when the value of one variable increases, the value of the other variable decreases.
Based n the Question:
Since there is no processing fee and the ticket price remains the same, we know that the fee will be proportional to the number of tickets purchased. The general form of the equation expressing the proportional relationship between the cost (c) and the number of tickets (t) is:
c = kt
where k is the constant of proportionality (the cost per ticket).
We can find k by using any of the data points given in the table. Using the first point, we have :
110 = k·2
Dividing the equation by 2:
110/2 = k = 55
Then using this value for k, the desired equation can be written:
c = 55t
Complete Question:
Total cost (in dollars) Number of concert tickets. the total costs in dollars are 110 275 440. the number in concert tickets are 2, 5, 8 Write an equation to describe the relationship between the total cost in dollars (c), and the number of tickets purchased (t),
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The length of the radius of a cylinder is twice its height. If its volume is 864x in', what is the
length of its radius?
A. 3 inches
B.6 inches
C. 12 inches
D. 24 inches
Answer: C. 12 inches
Step-by-step explanation: Let's use the formula for the volume of a cylinder, which is:
V = πr^2h
where V is the volume, r is the radius, and h is the height.
We ar given that the length of the radius is twice the height, which can be written as:
r = 2h
We are also given the volume of the cylinder, which is 864 cubic inches. Substituting the given values, we get:
864 = π(2h)^2h
Simplifying and solving for h:
864 =4πh^3
h^3 = 864/(4π)
h = 6
Now that we know the height of the cylinder is 6 inches, we can find the radius using the equation r = 2h:
r = 2(6) = 12 inches
Therefore, the length of the radius of the cylinder is 12 inches, which is option C.
from his purchased bags, randy counted 120 red candies out of 500 total candies. using a 90% confidence interval for the population proportion, what are the lower and upper limits of the interval? answer choices are rounded to the thousandths place.
As per the concept of confidence interval, we can be 90% confident that the true proportion of red candies in all the bags is between 0.195 and 0.285.
To do this, we first need to determine the level of confidence we want for our interval.
Next, we use a formula to calculate the confidence interval. The formula for a confidence interval for a population proportion is:
p ± z x √(p(1-p)/n)
where p is the sample proportion (in this case, 120/500 = 0.24), z* is the z-score that corresponds to the desired level of confidence (for a 90% confidence interval, z* = 1.645), and n is the sample size (in this case, 500).
Substituting the values into the formula, we get:
0.24 ± 1.645 x √(0.24(1-0.24)/500)
Simplifying, we get:
0.24 ± 0.045
Therefore, the lower limit of the confidence interval is 0.195 (0.24 - 0.045), and the upper limit is 0.285 (0.24 + 0.045).
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Complete with he function table for each equation
The numbers to correctly complete the table based on the function is 2, 3, 4, 5.
What does the function of the table shows?The function x-3 as any other function shows a pattern. In this case, it shows the way the value in column f(x) changes depending on the value of x. Here are some examples:
If the value of x is 34 = 34 - 3 = 31
If the value of x is 12 = 12 - 3 = 9
Based on this principle, the correct values to complete the table presented are 2, 3, 4, 5.
5 - 3 = 26 - 3 = 37 - 3 = 48 - 3 = 5Note: This question is incomplete; below I attach the missing section.
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Five interior angles of a hexagon measure 119°, 129°, 104°, 139°, and 95°. What is the measure of the sixth angle?
Answer:
A
Step-by-step explanation:
on a monte carlo roulette wheel, there are 37 slots: 18 red, 18 black, and 1 green. if you were to sit down and spin such a wheel 26 times, what would be the probability of duplicating the 26 straight blacks that occurred on august 18, 1913 at monte carlo?
If on a monte carlo roulette wheel, there are 37 slots: 18 red, 18 black, and 1 green, the probability of getting 26 straight blacks is approximately 3.143 x 10^-16.
The probability of duplicating the exact sequence of 26 straight blacks that occurred on August 18, 1913, is extremely low. Each spin of the wheel is an independent event, so the probability of getting a black on any given spin is always 18/37, regardless of what happened on previous spins.
To calculate the probability of getting 26 straight blacks, we can use the formula for the probability of a sequence of independent events, which is the product of the probabilities of each event. Therefore, the probability of getting 26 straight blacks is (18/37)^26, which is an extremely small number, approximately 3.143 x 10^-16.
Therefore, the probability of duplicating the 26 straight blacks that occurred on August 18, 1913, is so low that it's effectively impossible. It's important to note that each spin of the wheel is independent, so even if the wheel had produced 25 straight blacks, the probability of the next spin being black would still be 18/37.
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100 points!!!
Which choices are equivalent to the quotient below? Check all that apply. √50/√10
A.√25/√5
B.√15/√3
C.√5
D.15/3
E.√3
F.5
To simplify the quotient √50/√10, we need to factor out the largest perfect square that divides each radicand. In this case, we can factor out 25 from both 50 and 10 to get:
√50/√10 = √(252) / √(252) = √25 * √2 / √25 * √2 = √2
Therefore, the simplified form of the quotient is √2. Among the given choices, options B and E are equivalent to √2, as √15/√3 can be simplified as √(35)/√3 = √5 * √3 / √3 * √3 = √5/√3, and √3 is the same as √(31) and there is no √2 term in the denominator to combine with it. Hence, the options B and E are equivalent to the quotient √50/√10.