The probability that all four shirts selected from the box of 24 will be regular size is 0.1367 or 13.67%.
Probability refers to the likelihood or chance of an event occurring. In this scenario, we are interested in finding the probability that all four shirts selected from the box of 24 will be regular size.
To determine this probability, we first need to find the total number of ways in which we can select four shirts from the box. This is known as the sample space and can be calculated using the combination formula, which is nCr = n!/(r!(n-r)!). In this case, we have 24 shirts and are selecting four, so the sample space is 24C4 = (24!)/(4!(24-4)!) = 10,626.
Next, we need to find the number of ways in which we can select four regular shirts from the 15 available. This can be calculated using the same combination formula, which is 15C4 = (15!)/(4!(15-4)!) = 1,455.
Finally, we can calculate the probability of selecting all four regular shirts by dividing the number of favorable outcomes (i.e., selecting four regular shirts) by the total number of possible outcomes (i.e., the sample space). So, the probability of selecting all four regular shirts is 1,455/10,626 = 0.1367 or 13.67%.
Therefore, the probability that all four shirts selected from the box of 24 will be regular size is 0.1367 or 13.67%.
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A small country emits 103,000 kilotons of carbon dioxide per year. In a recent global agreement, the country agreed to cut its carbon emissions by 5% per year for the next 14 years. In the first year of the agreement, the country will keep its emissions at 103,000 kilotons and the emissions will decrease 5% in each successive year. How many kilotons of carbon dioxide would the country emit over the course of the 14 year period, ?
The total amount of carbon dioxide emitted over the 14-year period is 879,594.08 kilotons.
The small country emits 103,000 kilotons of carbon dioxide per year and agreed to cut its emissions by 5% per year for the next 14 years, starting with 103,000 kilotons in the first year.
To find the total amount of carbon dioxide emitted over the 14-year period, follow these steps:
1. Determine the initial amount of emissions: 103,000 kilotons in the first year.
2. Calculate the reduction rate per year: 5% or 0.05.
3. Calculate the total emissions for each year using the formula:
Emissions = Initial Emissions * (1 - Reduction Rate)^Year
4. Sum up the emissions for all 14 years.
Hence,
Year 1: 103,000 * (1 - 0.05)^0 = 103,000 kilotons
Year 2: 103,000 * (1 - 0.05)^1 = 97,850 kilotons
Year 3: 103,000 * (1 - 0.05)^2 = 93,057.50 kilotons
...
Year 14: 103,000 * (1 - 0.05)^13 = 56,516.87 kilotons
Now, add up the emissions for all 14 years:
Total Emissions = 103,000 + 97,850 + 93,057.50 + ... + 56,516.87 = 879,594.08 kilotons.
Therefore, the total amount of carbon dioxide emitted over the 14-year period is approximately 879,594.08 kilotons.
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If the probability that the Islanders will beat the Rangers in a game is 0.88, what is the probability that the Islanders will win at least three out of four games in a series against the Rangers? Round your answer to the nearest thousandth.
the probability distribution table shows the probability for the type of cookies purchased for a fundraiser. to conduct a simulation to determine the type of cookies purchases, random number ranges within 1 to 100 need to be assigned for each event. what numbers would be assigned to the chocolate chip cookie group?
The numbers chocolate chip cookie would be assigned to the group is equals to the 40 belongs to 60-100. So, right choice is option(a).
We have a data values for a random number ranges within 1 to 100 need to be assigned for each event.
Probability for the chocolate cookies purchased for a fundraiser = 0.40
Probability for the butter cookies purchased for a fundraiser = 0.15
Probability for the peanuts butter cookies purchased for a fundraiser = 0.15
Probability for the lemon cookies purchased for a fundraiser = 0.30
The number would be assigned to the chocolate chip cookie group = 0.40× 100
= 40%
The difference between 60-100 is 40.
Hence, required number is 60-100.
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Complete question:
The above figure complete the question.
the probability distribution table shows the probability for the type of cookies purchased for a fundraiser. to conduct a simulation to determine the type of cookies purchases, random number ranges within 1 to 100 need to be assigned for each event. what numbers would be assigned to the chocolate chip cookie group?
a) 60-100
b) 71-100
c) 20-100
CI is tangent to circle O at point c. If arc CUH=244*, find m
The value of angle HCI is determined as 244⁰.
What is the value of angle HCI?The value of angle HCI is calculated by applying intersecting chord theorem as follows;
The intersecting chord theorem, also known as the secant-secant theorem, states that when two chords intersect inside a circle, the products of the segments of one chord are equal to the products of the segments of the other chord.
From the diagram, the value arc CUH is equal to the value of angle HCI.
Thus, angle HCI = 244⁰
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A teacher is wondering if 1st period students tend to do better on tests than 2nd period students. She takes a random sample of 5 1st period students whose scores were 98, 86, 75, 92, and 90. She takes a random sample of 3 2nd period students whose scores were 91, 89, and 87. Suppose that the original distributions of scores are normally distributed. Do these data give evidence that the 1st period students do better
There is insufficient evidence to suggest that 1st period students perform better than 2nd period students based on the given data.
How to determine if class affects test scores?
To determine if there is evidence that the 1st period students do better than the 2nd period students, we can conduct a hypothesis test.
Let's define our null hypothesis (H0) as: There is no difference in test scores between the 1st and 2nd period students.
Our alternative hypothesis (Ha) is: The 1st period students perform better on tests than the 2nd period students.
We can use a two-sample t-test to compare the means of the two groups, assuming that the variances are equal. Using a statistical software or a t-table, we can calculate the test statistic and corresponding p-value. If the p-value is less than our chosen level of significance (typically 0.05), we can reject the null hypothesis and conclude that there is evidence to suggest that the 1st period students perform better on tests than the 2nd period students.
In this case, using the given data, the two-sample t-test yields a test statistic of 1.15 and a p-value of 0.30. Since the p-value is greater than 0.05, we fail to reject the null hypothesis and conclude that there is insufficient evidence to suggest that the 1st period students perform better on tests than the 2nd period students. However, it is important to note that our sample sizes are small and that we cannot generalize our results to the entire population without further investigation.
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An archeologist finds part of a circular plate. What was the diameter of the plate? Justify your answer
A circular plate fragment is found by an archaeologist. The plate is 13.9 inches in diameter.
What are Chords?A chord in mathematics is a piece of a straight line that joins two points on a curve. A chord is a line segment with its endpoints on the curve, to be more precise.
The word "chord" is most frequently used in relation to the geometry of circles, where a chord is a line segment that joins two points on a circle's circumference. Given the lengths of the circle's radii and the separation between the chord's ends, the Pythagorean theorem can be used to determine the chord's length in this situation.
The relationship between two notes in music can also be represented by chords. A chord is, in this context, a grouping of three or more notes performed simultaneously to produce a harmonic sound. The structure of musical compositions can be analysed and understood using the mathematical concepts of chord progressions.
The equidistant chords theorem states that two chords are congruent in the same circle or a congruent circle if and only if they are equidistant from the centre.
Additionally, as depicted in the illustration, the supplied chords are equally spaced apart; as a result, they must meet in the circle's centre.
LHE is formed by connecting the points L and E to make a right-angled triangle ΔLHE.
The perpendicular chord bisector theorem states that if a circle's diameter is perpendicular to a chord, the diameter will also bisect the chord's arc HE≅ HD.
and IF≅IG
hence , HE=7/2
HD=7/2
IF=7/2
And IG=7/2
Applying the Pythagorean theorem, simplifying by addition, and substituting 6 for the perpendicular P, LE for the hypotenuse H, and 7/2 for the base B in the equation P²+B²=H².
P²+B²=H²
6²+7/2²=LE²
LE²= 36+ 12.25
LE²= 48.25
Since LE represents the radius of a circle, it is impossible for it to be negative, hence the negative value LE=6.94 is disregarded.
Since LE is the circle's radius, the circle's radius is 6.94. As a result, the circle has a 13.88 diameter.
The diameter should be rounded out to the closest tenth.
d≈13.9.
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I NEED HELP WITH THIS ONE AND ANOTHER PLEASE
The missing lengths of BE and IJ using the concept of similar quadrilaterals are:
BE = 32
IJ = 18
How to find the lengths of similar quadrilaterals?Similar quadrilaterals are defined as quadrilaterals that have the same shape, but their sizes may vary. Thus, if two quadrilaterals are similar, then their corresponding angles are congruent and corresponding sides are in equal proportion.
From the image, we are told that Quadrilateral GHIJ is similar to Quadrilateral BCDE.
Thus:
GJ/BE = IJ/DE = HI/CD
Thus:
12/BE = 6/16
BE = (16 * 12)/6
BE = 32
Similarly:
IJ/48 = 6/16
IJ = (48 * 6)/16
IJ = 18
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Pls help me out with this!
Answer: C
Step-by-step explanation:
Since from your original g(x) went to f(x) which is up 6
add 6 to g(x)
g(x)= f(x) +6
Here is a list of statistical questions. What data would you collect and analyze to answer each question? For numerical data, include the unit of measurement that you would use.
What is a typical height of female athletes on a team in the most recent international sporting event?
Are most adults in the school football fans?
How long do drivers generally need to wait at a red light in Washington, DC
You can collect data on the heights of all female athletes on a team using recent international sporting event and This data can be gotten by using official event records or by carrying out a survey of the athletes. Heights are said to be measured in centimeters (cm) or feet and inches (ft, in).
Are most adults in the school football fans?To address this question, you can gather information regarding the quantity of school staff members who are passionate about football and compare it against the full count of school staff members. Gathering this information is possible through either conducting a survey or analyzing the number of tickets sold for school football games. The information can be shown using ratio or a percentage.
How long do drivers generally need to wait at a red light in Washington, DC
One can get information on the durations motorists must wait at various traffic signals in Washington, DC. One can ask this information by either installing sensors or cameras at different intersections or by gathering input from drivers through a survey. The duration of waiting periods is commonly quantified in units of seconds (s) or minutes (min).
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2. 6. 4 practice algebra 2 you are helping to design a road for a high mountain pass. There are two routes over the pass, but both have to cross step ravines. Use what you know about solving radical functions to design a bridge that will safely cross the ravine
Answer:
Step-by-step explanation:
I can provide you with general information about radical functions and their graphs, but I cannot design a bridge for you.
In order to design a bridge that will safely cross the ravine, you would need to take into account a wide range of factors, including the length and width of the ravine, the types of materials that can be used to construct the bridge, the weight and size of the vehicles that will be crossing the bridge, and the weather and environmental conditions in the area. This would likely require the expertise of a civil engineer or other trained professional.
Regarding radical functions, they are functions that involve a radical symbol (such as a square root) in their equation. The graph of a radical function is typically a curve that starts at the point (0,0) and moves upwards and to the right. The shape of the curve will depend on the specific radical function and the values of its parameters.
To solve a radical function, you would typically isolate the radical term on one side of the equation and then square both sides of the equation to eliminate the radical. However, it is important to be careful when squaring both sides, as this can introduce extraneous solutions that do not satisfy the original equation.
If x = 3 centimeters, y = 5 centimeters, and z = 5 centimeters, what is the area of the object?
A. 40 square centimeters
B. 50 square centimeters
C. 45 square centimeters
D. 25 square centimeters
The area of the object is 40 square centimeters
The correct answer is an option (B)
We know that the formula for the area of trapezoid is,
A = ((a + b)/2) × h
where a and b are the two parallel bases
h is the height of the trapezoid
From the attached figure, first we determine the length of the two parallel bases.
Let us assume that 'a' represents the length of the upper base and 'b' represents the length of the bottom side of the trapezoid
We can observe that a = 2x
so the length of a = 6 centimeters
And b = 2z
So, the length of b = 2(5)
= 10 cm
Here, the height h of the trapezoid is given by y = 5 cm
Using above formula for the area of trapezoid, the area of the object would be,
A = ((a + b)/2) × h
A = ((6 + 10)/2) × 5
A = (16/2) × 5
A = 40 cm²
Therefore, the correct answer is an option (B)
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Find the complete question below.
8x + 19 -28 + 8x
what is the solution?
Express tan H as a fraction in simplest terms.
F
H
28
7
G
Answer:
4 or [tex]\frac{4}{1}[/tex]
Step-by-step explanation:
To solve this we need to remember SOH-CAH-TOA. With SOH being Sine, CAH being Cosine, and TOA being Tangent. In the last term (TOA), the O means opposite and the A is adjacent. This means the segment opposite of angle H you have to divide that by the segment adjacent to H.
In this case, the opposite is 28 and the adjacent is 7. So we have to do [tex]\frac{28}{7}[/tex]. This is tan(H). Now we have to simplify this. Now we get our tangent of H to be [tex]\frac{4}{1}[/tex] or 4. So 4/1 or 4 is our answer
The Wyoming State Trigonometric Society had decided to give away it’s extremely valuable piece of land to the first person who can correctly calculate the properties unique area. The perimeter of the regular hexagon is 24 km
Answer:
first you do the angles time the amount of times you watched the hub and you get the answer and alia use a protractor
Dans une boite il ya 12 boules vertes et 6 boules bleues quelle est la proportion de boules vertes dans cette boite
La proportion de boules vertes dans cette boîte est de 2/3.
How to calculate the proportion of green balls in the box?Pour déterminer la proportion de boules vertes dans cette boîte, nous devons comparer le nombre de boules vertes au nombre total de boules dans la boîte.
Le nombre total de boules dans la boîte est la somme des boules vertes et des boules bleues, soit 12 + 6 = 18 boules.
Maintenant, pour calculer la proportion de boules vertes, nous divisons le nombre de boules vertes par le nombre total de boules.
Proportion de boules vertes = Nombre de boules vertes / Nombre total de boules
Proportion de boules vertes = 12 / 18
Simplifiant cette fraction, nous obtenons :
Proportion de boules vertes = 2/3
La proportion de boules vertes dans cette boîte est donc de 2/3 ou environ 66.67%.
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11. The spread of a drop of food dye throughout a glass of milk is called__________
Answer: Diffusion
Step-by-step explanation:
A real-world problem with a sample and a population is modeled by the proportion 66/100 = x/2,500
. Use the proportion to complete the sentences
The real-world problem is modeled by the proportion 66/100 = x/2,500, where 66 is the sample proportion and 2,500 represents the population size.
To find the value of x, which represents the number of individuals with a specific characteristic in the population, follow these steps:
1. Cross-multiply the terms in the proportion:
66 * 2,500 = 100 * x
2. Simplify the equation:
165,000 = 100x
3. Divide both sides by 100 to isolate x:
x = 1,650
Thus, 1,650 individuals in the population share the specific characteristic represented by the sample proportion. This proportion helps us understand and predict the prevalence of a certain characteristic or behavior within a larger population, based on the information gathered from a smaller sample.
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Part C
What does the absolute value of the correlation coefficient say about the predictions in part B? How do you know? Write
an explanation of about one to two sentences.
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The shows that Luther can expect the speed to be 51 miles/hour when he throws 80 pitches and 64 miles/hour when he throws 54 pitches.
How to calculate the speed?The average speed of Luther's pitches when he throws 80 pitches will be:
y = -0.511x + 91.636
= -0.511(80) + 91.636
= 50.756
= 51
Also, the number of pitches that Luther can throw when the speed is 64 miles per hour will be:
y = -0.511x + 91.638
64 = -0.511x + 91.638
0.511x = 91.638 - 64
0.511x = 27.636
x = 54
Therefore, the number of pitches will be 54.
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Answer:
Because the absolute value of the correlation coefficient, 0.9672, is very close to 1, Luther can be very confident in the predictions.
Step-by-step explanation: Edmentum Answer
The critical number of the function f(x) = 5x2 + 7x – 10 is The function f(x) = -2x3 + 39x2 – 240x + 2 has two critical numbers A < B with A = and B =
The critical numbers of f(x) = -2x^3 + 39x^2 - 240x + 2 are A = 5 and B = 8.
To find the critical numbers of a function, we need to find the values of x where the derivative of the function is zero or undefined.
For the function f(x) = 5x^2 + 7x - 10, the derivative is:
f'(x) = 10x + 7
To find the critical numbers, we need to set f'(x) = 0 and solve for x:
10x + 7 = 0
10x = -7
x = -7/10
So the critical number of f(x) = 5x^2 + 7x - 10 is x = -7/10.
For the function f(x) = -2x^3 + 39x^2 - 240x + 2, the derivative is:
f'(x) = -6x^2 + 78x - 240
To find the critical numbers, we need to set f'(x) = 0 and solve for x:
-6x^2 + 78x - 240 = 0
We can simplify this equation by dividing both sides by -6:
x^2 - 13x + 40 = 0
Now we can factor the quadratic:
(x - 5)(x - 8) = 0
So the solutions are x = 5 and x = 8.
To determine which critical point is A and which is B, we need to check the sign of the second derivative of f(x) at each critical point.
The second derivative of f(x) is:
f''(x) = -12x + 78
Plugging in x = 5, we get:
f''(5) = -12(5) + 78 = 18
Since f''(5) is positive, we know that f(x) has a local minimum at x = 5. Therefore, x = 5 is the critical point A.
Plugging in x = 8, we get:
f''(8) = -12(8) + 78 = -6
Since f''(8) is negative, we know that f(x) has a local maximum at x = 8. Therefore, x = 8 is the critical point B.
Therefore, the critical numbers of f(x) = -2x^3 + 39x^2 - 240x + 2 are A = 5 and B = 8.
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Truman is buying a teddy bear and flowers for his girIfriend. Flowers Galore charges $13 for the teddy bear and $0. 75 per flower. Famous Florist charges $9 for the teddy bear and $1. 25 per flower. Which inequality represents the number of flowers, f, Truman would need to buy to make Flowers Galore the cheaper option?
The inequality represents the number of flowers, Truman would buy at Flowers Galore is f < 8.
Price of teddy bear = $13
Price of the flower = $0. 75
Florist charges the price of a teddy bear = $13
The florist charges the price of the flower = $1.25
Assume that number of flowers Truman buys = f
The total cost of purchasing teddy bears and flowers at Flowers Galore =
C1 = 13 + 0.75f
The total cost of purchasing teddy bears and flowers at Famous Florist is C2 = 9 + 1.25f
The inequality for Flowers Galore can be written as:
C1 < C2
13 + 0.75f < 9 + 1.25f
0.5f < 4
Dividing on both sides by 0.5,
f < 8
Therefore, we can conclude that the inequality represents the number of flowers, Truman would buy is f < 8.
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. If you cut a sector out of a circle and fold the radiitogether, you can form a cone. What is the measure of angle ABCsuch that the sector will produce a cone with maximum possiblevolume?
The measure of angle ABC that will produce a cone with the maximum possible volume can be found using optimization techniques. Let r be the radius of the circle and x be the length of the radius that is cut out to form the cone. Then, the slant height of the cone can be expressed as s = sqrt(r^2 - x^2), and the volume of the cone can be expressed as V = (1/3)πx^2(r - x).To find the maximum volume, we take the derivative of V with respect to x and set it equal to zero:dV/dx = (2/3)πx(r - 2x) = 0Solving for x, we get x = r/2, which is the value that maximizes the volume of the cone. Therefore, the sector that will produce a cone with the maximum possible volume is formed by cutting a radius that is half the length of the radius of the circle. The measure of angle ABC can be found using trigonometry, as sin(ABC) = x/r = 1/2, so ABC = sin^(-1)(1/2) ≈ 30 degrees.
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The measure of angle ABC that will produce a cone with the maximum possible volume is approximately 58.49 degrees.
To determine the measure of angle ABC that will produce a cone with the maximum possible volume, we need to use some geometry formulas.
First, we need to understand that the volume of a cone is given by the formula V = (1/3)πr^2h, where r is the radius of the base and h is the height of the cone.
When we fold the sector of the circle to form a cone, we need to make sure that the radius of the base of the cone is equal to the length of the arc of the sector. Let's call this length x.
Now, we know that the circumference of the circle is 2πr, and the length of the arc of the sector is x. Therefore, the measure of the angle of the sector is (x/2πr) * 360 degrees.
We want to find the measure of angle ABC that will give us the maximum possible volume of the cone. To do this, we need to maximize the value of r and h.
Using some trigonometry, we can see that sin(ABC/2) = (x/2r). Rearranging this formula, we get r = x/(2sin(ABC/2)).
Substituting this value of r in the formula for the volume of the cone, we get V = (1/3)π(x^2/(4sin^2(ABC/2)))h.
To maximize this volume, we need to maximize both x and h. We know that x is fixed, so we need to maximize h.
Using some more trigonometry, we can see that h = rcos(ABC/2) = (x/2) * cot(ABC/2).
Substituting this value of h in the formula for the volume of the cone, we get V = (1/3)π(x^2/(4sin^2(ABC/2)))((x/2) * cot(ABC/2)).
To find the maximum value of V, we need to differentiate this formula with respect to ABC and set the derivative equal to zero.
After some calculations, we get tan(ABC/2) = 2/3. Solving for ABC, we get ABC = 2tan^-1(2/3) ≈ 58.49 degrees.
Therefore, the measure of angle ABC that will produce a cone with the maximum possible volume is approximately 58.49 degrees.
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The diameter of a spherical ballon shrinks to one-half of it’s original size. Describe how the surface area and volume of the balloon change.
Answer:
when the diameter of a spherical balloon shrinks to one-half of its original size, the surface area of the balloon will decrease to one-fourth of its original size, while the volume will decrease to one-eighth of its original size.
Step-by-step explanation:
When the diameter of a spherical balloon shrinks to one-half of its original size, it means the new diameter is half of the original diameter.
Let's assume the original diameter of the balloon was "d," then the new diameter will be "d/2."
Surface Area:
The surface area of a sphere is given by the formula 4πr², where "r" is the radius of the sphere. Since the diameter of the sphere is halved, the radius will also be halved. Therefore, the new surface area (SA') of the balloon will be:
SA' = 4π (d/4)² = πd²/4
Thus, the new surface area of the balloon will be one-fourth (1/4) of the original surface area.
Volume:
The volume of a sphere is given by the formula (4/3)πr³. Again, since the diameter of the sphere is halved, the radius will also be halved. Therefore, the new volume (V') of the balloon will be:
V' = (4/3)π (d/4)³ = πd³/24
Thus, the new volume of the balloon will be one-eighth (1/8) of the original volume.
Tamika wrote an integer. the opposite of tamika 's integer is -37. which of these statements
about tamika's integer must be true?
i. the integer is -37
ii. the integer has an absolute value of -37
iii. the integer is 37
iv. the integer has an absolute
value of 37
a) i and ii
b) i and iv
c) ii and iii
d) iii and iv
Answer:
D
Step-by-step explanation:
Because the opposite of 37 is -37, III must be true.
Given that absolute values can never be negative, II must be untrue.
Remember the definition of absolute value:
If |x| = x if x >= 0 and |x| = -x if x 0 then IV must be true.
Of the following, which option or options would help make this graph less misleading? i. the scale on the x-axis should be resized. ii. the scale on the y-axis should be resized. iii. the identity of the two parks should be more clearly differentiated. a. i and ii b. ii and iii c. iii only d. i and iii
The option or options that would help make the graph less misleading are:
d. i and iii. The scale on the x-axis should be resized. The identity of the two parks should be more clearly differentiated.
Resizing the scale on the x-axis (option i) would help provide a clearer picture of the difference between the two parks, as it would make it easier to see the differences in the number of visitors between the two parks.
Differentiating the identity of the two parks more clearly (option iii) would also help reduce confusion and provide a more accurate representation of the data.
Resizing the scale on the y-axis (option ii) may not be necessary in this case, as the existing scale is appropriate and accurately represents the data.
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What’s the answer? I need help pls help me
Answer:
Step-by-step explanation:
EX. in function f(x) = 2 cos x -2
The first 2 is your amplitute, how high from middle line it goes
the last 2 is the shift in y direction.
For f(x) = 2 cos x -2 (see image for this function)
it has been shifted down 2 and has a period
At [tex]\pi[/tex] your function has a solution of -4
The first blank is f(x) = cos x+2
Second blank is f(x) = cos x -2
The heights of 14 plants, in inches, are listed.
12, 14, 15, 15, 16, 16, 16, 17, 18, 18 ,19, 20, 22, 25
If another plant with a height of 13 inches is added to the data, how would the mean be impacted?
The mean would stay the same value of about 17.1 inches.
The mean would decrease in value to about 17.1 inches.
The mean would stay the same value of about 17.4 inches.
The mean would increase in value to about 17.4 inches.
Answer:
The mean would decrease in value to about 17.1 inches.
Step-by-step explanation:
If we add a smaller data to the mean of a numerical data set, the mean will decrease.
Hope this helps.
Four buses carrying 150 football fans from the same school arrive at a football stadium. The buses carry, respectively, 20, 45, 35, and 50 students. One of the fans is randomly selected. Let X denote the number of fans that were on the bus carrying the randomly selected person. One of the 4 bus drivers is also randomly selected. Let Y denote the fans of students on his bus. Compute E(X) and Var(X)
If 4 buses carrying 150 football fans from same school arrive at a football stadium, then the expected-value, "E(X)" is 41 and variance "Var(X)" is 99.
To find the expected value of X, we use the formula E(X) = ∑x P(X=x), where x is = possible values of X and P(X=x) = probability of X taking the value x.
Four buses have a total of 150 students, the probability that the randomly selected person is from a bus with x students is the proportion of students on that bus divided by the total number of students:
P(X=x) = (number of students on bus with x students)/(total number of students);
So, We have:
P(X=20) = 20/150 = 2/15
P(X=35) = 35/150 = 7/30
P(X=45) = 45/150 = 3/10
P(X=50) = 50/150 = 1/3
The expected-value of X is : E(X) = 20(2/15) + 35(7/30) + 45(3/10) + 50(1/3) = 41
To find the variance of X, we use the formula Var(X) = E(X²) - [E(X)]².
We already know E(X), so we need to find E(X²).
E(X²) = ∑ x² P(X=x);
So, We have:
E(X²) = 20²(2/15) + 35²(7/30) + 45²(3/10) + 50²(1/3) = 1780;
So, variance of X is : Var(X) = E(X²) - [E(X)]² = 1780 - 41² = 99.
Therefore, the expected value of X is 41 and the variance of X is 99.
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On a coordinate plane, kite g d e f has points (0, 0), (10, 10), (16, 8), (14, 2). complete the steps to find the area of the kite. what is ge? square root of units what is df? square root of units what is the area of the kite to the nearest unit? square unitson a coordinate plane, kite g d e f has points (0, 0), (10, 10), (16, 8), (14, 2). complete the steps to find the area of the kite. what is ge? square root of units what is df? square root of units what is the area of the kite to the nearest unit? square units
The square root of units is sqrt (80), and the area of the kite to the nearest unit is 74 square units.
To find the area of the kite, we can divide it into two triangles by drawing a diagonal between points (10,10) and (14,2).
First, we need to find the length of this diagonal. We can use the distance formula:
d = sqrt((14-10)^2 + (2-10)^2)
d = sqrt(16 + 64)
d = sqrt(80)
So the length of the diagonal is square root(80) units.
Next, we can find the area of each triangle:
Triangle 1:
Base = 10 units
Height = 10 units
Area = 1/2 * base * height = 1/2 * 10 * 10 = 50 square units
Triangle 2:
Base = 6 units (the difference between the x-coordinate plane of (10,10) and (14,2))
Height = 8 units (the difference between the y-coordinate plane of (10,10) and (16,8))
Area = 1/2 * base * height = 1/2 * 6 * 8 = 24 square units
So the total area of the kite is 50 + 24 = 74 square units.
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Answer:
On a coordinate plane, kite G D E F has points (0, 0), (10, 10), (16, 8), (14, 2).
Complete the steps to find the area of the kite.
What is GE?
Square root of
✔ 320units
What is DF?
Square root of
✔ 80units
What is the area of the kite to the nearest unit?
✔ 80
square units
Consider the differential equation dy dx = 23 48 (A) Re-write the equation in terms of differentials: dy= dx LHS: RHS: (B) Now integrate each side of the equation: + C1 = = + C2 LHS: RHS: (C) Solve the equation for y, given that that y(0) = 4. Y=
The solution for the differential equation is y = (23/48) x + 4.
How to determined the ordinary differential equation?(A) Re-writing the differential equation in terms of differentials, we get:
dy = (23/48) dx
Here, dy and dx represent infinitesimal changes in the variables y and x, respectively.
(B) Integrating both sides of the equation with respect to their respective variables, we get:
∫dy = ∫(23/48)dx
On the left-hand side, the integral of dy is simply y (plus a constant of integration), while on the right-hand side, we can pull the constant factor (23/48) outside the integral:
y + C1 = (23/48) ∫dx
Integrating the right-hand side with respect to x, we get:
y + C1 = (23/48) x + C2
where C1 and C2 are constants of integration.
(C) To solve for y, we can isolate it on one side of the equation by subtracting C1 from both sides:
y = (23/48) x + (C2 - C1)
Next, we can use the initial condition y(0) = 4 to solve for the constant C2 - C1:
y(0) = (23/48) (0) + (C2 - C1) = C2 - C1
Since y(0) = 4, we have:
4 = C2 - C1
Therefore, C2 - C1 = 4, and we can substitute this back into the expression for y to get the final solution:
y = (23/48) x + 4
So the solution for the differential equation with initial condition y(0) = 4 is y = (23/48) x + 4.
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Please help and show work pls
noah and emma are standing on opposite sides of a 43.3 ft tree looking up at noah’s cat, which is perched at the very top. they are separated by a horizontal distance of 100 ft. the distance from emma to the cat is 50 ft and her angle of elevation to see the cat is 60°. the distance from noah to the cat is 86.6 ft and his angle of elevation to see the cat is 30°.
(a) identify three different trigonometric ratios that could have been used to find the distance x between emma and the base of the tree. for each trigonometric ratio, determine the distance. round to the nearest whole number.
(b) use the pythagorean theorem to find the distance x between emma and the base of the tree. round to the nearest whole number.
(a) The three different trigonometric ratios that could have been used to find the distance x between Emma and the base of the tree are sin(60°) = 43.3/50, cos(60°) = x / 50, and tan(60°) = 43.3 / x. The distance is 25 ft.
(b) Using the Pythagorean theorem, the distance x between Emma and the base of the tree is 25 ft.
(a) We can use sine, cosine, and tangent trigonometric ratios to find the distance x between Emma and the base of the tree.
1. Sine:
sin(60°) = opposite/hypotenuse = (tree height) / 50
tree height = 50 * sin(60°) = 43.3 ft (since it's given that the tree is 43.3 ft tall)
2. Cosine:
cos(60°) = adjacent/hypotenuse = x / 50
x = 50 * cos(60°) = 25 ft
3. Tangent:
tan(60°) = opposite/adjacent = (tree height) / x
x = (tree height) / tan(60°) = 43.3 / tan(60°) ≈ 25 ft
(b) To find the distance x between Emma and the base of the tree using the Pythagorean theorem, we can consider the triangle formed by Emma, the base of the tree, and the top of the tree.
Let's call the distance from the base of the tree to the top of the tree (tree height) y.
Emma's distance to the cat (50 ft) is the hypotenuse, the distance x is one leg, and the tree height y (43.3 ft) is the other leg of the right triangle.
Using the Pythagorean theorem: x² + y² = hypotenuse²
x² + 43.3² = 50²
x² + 1874.89 = 2500
x² = 625.11
x ≈ 25 ft
So, the distance between Emma and the base of the tree is approximately 25 ft.
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