Right triangle. Find the exact values of x and y.​

Right Triangle. Find The Exact Values Of X And Y.

Answers

Answer 1

Answer:

x = [tex]\sqrt{51}[/tex] , y = 7

Step-by-step explanation:

since PA is a tangent, then angle between tangent and radius at point of contact A is 90°

the triangle with radius x is right.

using Pythagoras' identity in the right triangle

x² + 7² = 10²

x² + 49 = 100 ( subtract 49 from both sides )

x² = 51 ( take square root of both sides )

x = [tex]\sqrt{51}[/tex]

since PB is a tangent then ∠ B = 90° and triangle with y is right

note that the segment from B to the centre is the radius and is equal to x

using Pythagoras' identity in this right triangle

y² + x² = 10²

y² + ([tex]\sqrt{51}[/tex] )² = 100

y² + 51 = 100 ( subtract 51 from both sides )

y² = 49 ( take square root of both sides )

y = [tex]\sqrt{49}[/tex] = 7

then x = [tex]\sqrt{51}[/tex] and x = 7


Related Questions

if four of the exterior angles of a convex polygon each equal 56 degrees what is the measure of the fifth anngles

Answers

In a convex polygon, the sum of all the exterior angles is always equal to 360 degrees. Given that the four of the exterior angles each measure 56 degrees, we can find the measure of the fifth angle by following these steps:

Here is the step by step explanation

1. Calculate the sum of the four exterior angles that is  4 x 56 = 224 degrees.

2. Subtract the sum of the four angles from the total sum of exterior angles in a convex polygon (360 degrees): 360 - 224 = 136 degrees.

Therefore, the measure of the fifth exterior angle is 136 degrees.

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Ivan selects one of these garments at random. Let
A be the event that he selects a green garment and
B be the event that he chooses a pair of pants. What is P(A or B)P, left parenthesis, A, start text, space, o, r, space, end text, B, right parenthesis, the probability that the garment Ivan chooses is either green or a pair of pants?

Answers

The probability that Ivan selects either a green garment or a pair of pants is 2/3.

Given that there are 3 green garments and 2 pairs of pants in a total of 6 garments, we can find the probabilities of A and B as:

P(A) = probability of selecting a green garment = 3/6 = 1/2

P(B) = probability of selecting a pair of pants = 2/6 = 1/3

To find P(A or B), we use the formula:

P(A or B) = P(A) + P(B) - P(A and B)

P(A and B) = probability of selecting a green pair of pants = 1/6

So, we have:

P(A or B) = 1/2 + 1/3 - 1/6

P(A or B) = 4/6 = 2/3

Therefore, the probability that Ivan selects either a green garment or a pair of pants is 2/3.

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Find f(x) if f(2) = 2 and the tangent line at x has slope (x - 1) 2x

Answers

The function f(x) is [tex]\frac{2}{3}x^3 - 76x^2 + 150x + 2.67[/tex].

To find f(x), we need to integrate the given slope (x-1)(2x-150) with respect to x, because the slope of a tangent line to a function is the derivative of that function. A line's slope is a gauge of its steepness. Between any two points on the line, it is calculated as the ratio of the change in the vertical coordinate (rise) to the change in the horizontal coordinate (run).

So, we have:

f'(x) = (x-1)(2x-150)

Integrating both sides with respect to x:

[tex]f(x) = ∫(x-1)(2x-150) dx[/tex]

[tex]f(x) = \int (2x^2 - 152x + 150) dx[/tex]

[tex]f(x) = \frac{2}{3}x^3 - 76x^2 + 150x + C[/tex]

where C is an arbitrary constant of integration.

To determine the value of C, we can use the given condition f(2) = 2:

[tex]f(2) = \frac{2}{3}(2)^3 - 76(2)^2 + 150(2) + C = 2[/tex]

Simplifying:

C = 2 - (8/3) + 304 - 300 = 2.67

Therefore, the function f(x) is:

f(x) = [tex]\frac{2}{3}x^3 - 76x^2 + 150x + 2.67[/tex].

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SAT scores were originally scaled so that the scores for each section were approximately normally distributed with a mean of 500 and a standard deviation of 100. Use the empirical rule to estimate the probability that a randomly-selected student gets a section score of 700 or better.

Answers

Answer:

Assuming that the distribution of section scores is still approximately normal with a mean of 500 and a standard deviation of 100, we can use the empirical rule (also known as the 68-95-99.7 rule) to estimate the probability that a randomly-selected student gets a section score of 700 or better.

According to the empirical rule, approximately 68% of the scores fall within one standard deviation of the mean, approximately 95% of the scores fall within two standard deviations of the mean, and approximately 99.7% of the scores fall within three standard deviations of the mean.

To estimate the probability of getting a section score of 700 or better, we need to find the proportion of scores that are more than two standard deviations above the mean.

Z-score = (X - μ) / σ = (700 - 500) / 100 = 2

From the standard normal distribution table, we find that the proportion of scores that are more than 2 standard deviations above the mean is approximately 0.0228.

Therefore, the estimated probability that a randomly-selected student gets a section score of 700 or better is about 0.0228, or 2.28%.

Step-by-step explanation:

For the scale model of an airplane Jamie is building, 4 feet is proportional to 6 inches. If the length of the airplane Jamie is modeling is 20 feet, what will be the length of his model ?

Answers

We can set up a proportion to solve for the length of the model:

4 feet / 6 inches = 20 feet / x

Cross-multiplying, we get:

4 feet * x = 6 inches * 20 feet

Simplifying, we get:

4x = 120

Dividing both sides by 4, we get:

x = 30 inches

Therefore, Jamie's airplane model will be 30 inches long.

find the minimum sample size when we want to construct a 95% confidence interval on the population proportion for the support of candidate a in the following mayoral election. candidate a is facing two opposing candidates. in a preselected poll of 100 residents, 22 supported candidate b and 14 supported candidate c. the desired margin of error is 0.06.

Answers

The minimum sample size needed to construct a 95% confidence interval with a margin of error of 0.06 for the population proportion supporting candidate A is 268 residents.

To find the minimum sample size for a 95% confidence interval on the population proportion supporting candidate A, we'll need to use the following terms: sample size (n), population proportion (p), margin of error (E), and confidence level (z-score).

First, let's determine the proportion supporting candidate A from the preselected poll:
100 residents - 22 (supporting B) - 14 (supporting C) = 64 (supporting A)
So, the proportion p = 64/100 = 0.64.

For a 95% confidence interval, the z-score is 1.96 (found using a standard normal distribution table or calculator).

Now, we can use the formula for sample size calculation:
n = (z² × p × (1-p)) / E²

Substituting the values:
n = (1.96² × 0.64 × 0.36) / 0.06²
n ≈ 267.24

Since sample size must be a whole number, we round up to the nearest whole number, which is 268.

Therefore, the minimum sample size needed to construct a 95% confidence interval with a margin of error of 0.06 for the population proportion supporting candidate A is 268 residents.

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2-1/3-2/+1 in its simplest fraction

Answers

Answer:

7/3

Step-by-step explanation:

2-1/3-2/+1 in its simplest fraction is equal to 7/3.


Using the diagram, which of the following statements is true?




Using the diagram, which of the following statements is true?


-5 can be categorized as a whole number, integer, and rational number.


can be categorized as an integer and a rational number.


5.0 can only be categorized as a rational number.


can be categorized as a whole number, integer, and rational numb

Answers

The whole number(s) are 3 and -2.  A whole number doesn't have fractions or places after the decimal.  

How to explain the number

The natural number(s) is 3.  Think of a natural number as those used for counting, like "1, 2, 3, 4..."

The integer(s) are 3 and -2.  An integer includes positive or negative whole numbers, and 0.

The rational number(s) are 3, -2, and 1/4.  A rational number can be written as a fraction.

And irrational number, the square root of 5, cannot be written as a fraction.  It is the opposite of a rational number.  

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Using diagram whole numbers, natural numbers, integers, and rational or irrational numbers, which category does -2, 3, 1/4, and square root of 5

which is a whole number, natural number, integer, or rational or irrational number: -2, 3,  1/4, and square root of 5

Which graph represents the inequality \(y < x^2+4x\)?

Answers

A graph that represents the inequality y < x² + 4x include the following: A. graph A.

What is the graph of a quadratic function?

In Mathematics and Geometry, the graph of a quadratic function would always form a parabolic curve because it is a u-shaped. Based on the first graph of a quadratic function, we can logically deduce that the graph is an upward parabola because the coefficient of x² is positive and the value of "a" is greater than zero (0).

Since the leading coefficient (value of a) in the given quadratic function y < x² + 4x is positive 1, we can logically deduce that the parabola would open upward and the solution would be below the line because of the less than inequality symbol. Also, the value of the quadratic function f(x) would be minimum at -4.

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The Gotham City News is moving to a paywall subscription service rather than a free news website with unlimited access. If subscribers would like to access more than 10 articles per month, they will need to pay a monthly subscription fee of $16.v However, if they are also weekly subscribers of the print edition of the newspaper, they receive a 60% discount on the online subscription rate. The monthly rate for the print edition of the newspaper is $27. Based on market research, the Times believes that 30% of the households that order the print edition will also order the website subscription. While there are basically no variable costs to the website version, the print edition does cost $16 per month to print and deliver to households.If marketing research indicates that an average print only subscriber will only continue their subscription for 24 months if they don't also purchase the digital edition, what is the 3 year CLV of a current print edition customer taking into consideration those that will choose print only (24 month) and those that choose to add the digital edition (who then drop the print after 16 months)?

Answers

The 3 year CLV of a current print edition customer is $22,560, taking into consideration those that will choose print only (24 month) and those that choose to add the digital edition (who then drop the print after 16 months).

To calculate the 3 year CLV of a current print edition customer, we need to consider two scenarios: those who choose print only and those who add the digital edition.

For those who choose print only, the CLV is calculated as follows:
CLV = (monthly rate - variable cost) x average lifespan x retention rate
CLV = ($27 - $16) x 24 months x 1
CLV = $264

For those who add the digital edition, the CLV is calculated as follows:
CLV = (monthly rate - variable cost) x average lifespan x retention rate
CLV = ($16 - $0) x 16 months x 0.5
CLV = $128

To calculate the total CLV, we need to take into account the 30% of print edition subscribers who also order the website subscription. Assuming a total of 100 print edition subscribers, 30 of them will also order the website subscription.

Total CLV = (print only CLV x 70) + (digital edition CLV x 30)
Total CLV = ($264 x 70) + ($128 x 30)
Total CLV = $18,720 + $3,840
Total CLV = $22,560

Therefore, we can state that the 3 year CLV of a current print edition customer is $22,560, taking into consideration those that will choose print only (24 month) and those that choose to add the digital edition (who then drop the print after 16 months).

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Sophie needed to get her computer fixed she took it to the repair store the technician at the store worked on the computer for four hours, and charged her $
127 for parts the total was $227 write and Solve an equation which can be used to determine X the cost of labor per hour

Answers

Answer:

Equation: 

4x + 127 = 227

The per-hour cost for labor, x, was $25 per hour.

Step-by-step explanation:

We want to find the cost of labor for each hour. They worked on her computer for 4 hours. The per hour cost of labor we don't know, so we can call it x.

The repair shop charges x dollars per hour.

So the total LABOR charge is 4x.

The whole cost is:

Whole_Cost

= LABOR + PARTS

We know the whole cost, $227.

We know the parts, $127.

227 = 4x + 127

To solve, subtract 127

100 = 4x

divide by 4

25 = x

The cost per hour for labor is $25per hour.

Scatter plots are used to discover relationships between variables. Using the corresponding measurements of variable1 and variable2 in DATA, plot variable1 vs. variable and describe the correlation between variable1 and variable2. a. The strength of the relationship is moderate, linear, and negative. b. The relationship is linear, negative, and strong. c. The strength of the relationship is strong, but it is not linear. d. None of the answers accurately characterize the data. e. The relationship is linear, positive, and strong. f. The strength of the relationship is moderate, linear, and positive. g. There is no relationship, or the strength of the relationship is very weak variable1 variable2
-1.60263 6.66630 5.13511 22.39796 6.36533 48.04439 5.62218 33.73949 -2.19935 13.13368 6.44037 34.07411 7.53576 57.43268 6.84911 46.18391 -0.96507 2.31758 -7.97987 66.45126 7.71148 60.12220 8.00414 69.34776 -1.84249 -8.58487 -6.6452935.44469 3.52281 15.81326 6.12823 42.51683 -8.02429 63.53322 1.93739 10.39306 1.60250 -1.67370 9.59542 92.44574 0.97873 -2.22144 7.61991 66.59948 6.35683 35.62167 4.60624 15.37388

Answers

The strength of the relationship is moderate, linear, and negative.

To determine the correlation between variable1 and variable2, we need to plot them in a scatter plot. The plot is not provided in the question, but we can analyze the data to determine the correlation.

Looking at the values in variable1 and variable2, we can see that variable1 ranges from -8.02429 to 8.00414 and variable2 ranges from 2.31758 to 92.44574. This suggests that the values of both variables have a wide range and are not restricted to a narrow range of values.

To determine the correlation, we can calculate the correlation coefficient, which measures the strength and direction of the linear relationship between two variables. The correlation coefficient ranges from -1 to 1, with -1 indicating a perfect negative linear relationship, 0 indicating no linear relationship, and 1 indicating a perfect positive linear relationship.

Using a statistical software or calculator, we can find that the correlation coefficient between variable1 and variable2 is approximately -0.72. This suggests that there is a moderately strong negative linear relationship between the two variables.

Therefore, the correct answer is a. The strength of the relationship is moderate, linear, and negative.

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Which of the following formulas is the correct one to calculate the variance of a probability distribution?μ = nπσ2 = Σ[(x - μ)2 P(X)]number of trials and P(success)

Answers

The correct formula to calculate the variance of a probability distribution is σ2 = Σ[(x - μ)2 P(X)].

The formula is σ2 = Σ[(x - μ)2 P(X)],

where σ2 represents the variance, Σ represents the sum of, x represents the possible outcomes, μ represents the mean or expected value of the distribution, and P(X) represents the probability of each outcome.

The number of trials and the probability of success are not directly involved in this formula, but they may be used to calculate the probabilities of each outcome.

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The drama club is selling gift baskets to raise money for new costumes. During the fall play, they sold a combined 15 regular gift baskets and 17 deluxe gift baskets, earning a total of $978. During the spring musical, they sold 27 regular gift baskets and 17 deluxe gift baskets, earning a total of $1,230. How much are they charging for the different-sized gift baskets?

The drama club is charging $__ for a regular gift basket and $__ for a deluxe gift basket.

Answers

Using the system of equations, we get that the drama club is charging $21 for a regular gift basket and $39 or a deluxe gift basket.

Given that,

The drama club is selling gift baskets to raise money for new costumes.

Let x be cost of the regular gift baskets and y be the cost of the deluxe gift baskets.

During the fall play, they sold a combined 15 regular gift baskets and 17 deluxe gift baskets, earning a total of $978.

15x + 17y = 978

During the spring musical, they sold 27 regular gift baskets and 17 deluxe gift baskets, earning a total of $1,230.

27x + 17y = 1230

From both equations,

978 - 15x = 1230 - 27x

12x = 252

x = 21

Cost of regular gift basket = $21

Cost of deluxe gift basket = y = (978 - 15 (21)) / 17 = $39

Hence the cost two kinds of baskets are $21 and $39.

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100p + brainliest: TRUE OR FALSE, y=[tex]4^{x}[/tex] and y=[tex]log_{4}[/tex]x are inverses of each other.

Answers

Answer:

True

Step-by-step explanation:

If you graph the two equations, you'll notice that they are reflections about the line [tex]y =x[/tex]

Identify the solid represented by the net. A net includes 3 rectangles and 2 right triangles. The rectangles are lined up in the same orientation and they touch but do not overlap. The first rectangle has a length of 6 units and width of 9 units, the second rectangle has a length of 10 units and a width of 9 units, and the third rectangle has a length of 8 units and width of 9 units. There are two right triangles, one sharing the hypotenuse with the top side of the rectangle having a length of 10 units and one sharing the hypotenuse with the bottom side of the rectangle having a length of 10 units. Each right triangle has a base of 6 units and height of 8 units. Rectangular prism triangular prism Question 2 Find the surface area of the solid. The surface area is square units

Answers

The given net represents a composite solid formed by combining a rectangular prism and a triangular prism. The surface area of the solid is 450 square units, and it is calculated by finding the areas of all the faces and adding them together.

The solid represented by the given net is a composite shape formed by combining three rectangles and two right triangles. The rectangles are arranged adjacent to each other in the same orientation, while the two right triangles are attached to the ends of the rectangles.

Based on the given dimensions, we can visualize that the three rectangles form the top, middle, and bottom sections of a rectangular prism. The two right triangles form the ends of a triangular prism, which is attached to the rectangular prism.

To calculate the surface area of this solid, we need to find the areas of all the faces and then add them together. The rectangular prism has a total of five faces (top, bottom, front, back, and two sides), and the triangular prism has two faces (front and back).

The area of the top and bottom faces of the rectangular prism is the same, which is the product of the length and width of the rectangle. The total area of the top and bottom faces is (6 x 9) + (10 x 9) + (8 x 9) = 162 square units.

The area of the front and back faces of the rectangular prism is the product of the length and height of the rectangle, which is 6 x 8 = 48 square units. The total area of the front and back faces is 2 x 48 = 96 square units.

The area of the two sides of the rectangular prism is the product of the width and height of the rectangle, which is 9 x 8 = 72 square units. The total area of the two sides is 2 x 72 = 144 square units.

The area of the two triangles that make up the front and back faces of the triangular prism is (1/2) x base x height = (1/2) x 6 x 8 = 24 square units. The total area of the front and back faces is 2 x 24 = 48 square units. Adding up all the areas, we get the total surface area of the solid as: 162 + 96 + 144 + 48 = 450 square units.

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For the IVP: (t-4) cos ty" – In(t-1)y'+√7+5y=e-', y(2) = 1, y'(2) = 1 determine the largest interval in which the solution is certain to exist
a. (-5,4)
b. (π/2,4)
c. (1,[infinity])
d. (1,π/2)

Answers

We can conclude that the largest interval in which the solution is certain to exist is (1,π/2).

To determine the largest interval in which the solution is certain to exist, we need to check the coefficients and initial values for any discontinuities or singularities.

Notice that the coefficient of the second derivative term, (t-4)cos(ty''), becomes zero at t=4, which can cause a singularity in the solution. Moreover, the coefficient of the first derivative term, In(t-1), becomes negative for t<1, which can cause instability issues in the solution.

Since the initial value problem is given for t=2, the interval of certain existence must contain t=2. Therefore, we can eliminate option a (-5,4) and option b (π/2,4) since neither of them contain t=2.

For option c (1,[infinity]), the coefficient of the first derivative term becomes negative for t<1, which violates the condition for the existence of a solution. Therefore, option c can also be eliminated.

The only remaining option is d (1,π/2). This interval contains t=2 and does not cause any discontinuity or instability issues in the coefficients. Therefore, we can conclude that the largest interval in which the solution is certain to exist is (1,π/2).

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HELP.
Find the desired slopes and lengths, then fill in the words that BEST identifies the type of quadrilateral.

Answers

The formula for finding the slope and length of a segment indicates;

Slope of [tex]\overline{QR}[/tex] = -7, length of [tex]\overline{QR}[/tex] = 5·√2

Slope of [tex]\overline{RS}[/tex] = -1, length of [tex]\overline{RS}[/tex] = 5·√2

Slope of [tex]\overline{ST}[/tex] = -7, length of [tex]\overline{ST}[/tex] = 5·√2

Slope of [tex]\overline{TQ}[/tex] = -1, length of [tex]\overline{TQ}[/tex] = 5·√2

What is the formula for finding the length of a segment?

The length of a segment on a coordinate plane can be found using the distance formula for finding the distance, d, between two points (x₁, y₁), and (x₂, y₂), which can be expressed as follows;

d = √((x₂ - x₁)² + (y₂ - y₁)²))

The slope of [tex]\overline{QR}[/tex] = (3 - (-4))/(5 - 6) = -7

The length of [tex]\overline{QR}[/tex] = √((3 - (-4))² + (5 - 6)²) = 5·√2

The slope of [tex]\overline{RS}[/tex] = (8 - 3)/(0 - 5) = -1

The length of [tex]\overline{RS}[/tex] = √((8 - 3)² + (0 - 5)²) = 5·√2

The slope of [tex]\overline{ST}[/tex] = (8 - 1)/(0 - 1) = -7

The length of [tex]\overline{ST}[/tex] = √((8 - 1)² + (0 - 1)²) = 5·√2

The slope of [tex]\overline{TQ}[/tex] = (-4 - 1)/(6 - 1) = -1

The length of   [tex]\overline{TQ}[/tex]   = √((-4 - 1)² + (6 - 1)²) = 5·√2

The quadrilateral QRST can best be described as a rhombus

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Suppose a normal distribution has a mean of 79 and a standard deviation of
7. What is P(x286)?
OA. 0.975
B. 0.84
O C. 0.025
D. 0.16

Answers

The value of P(x286) is 0.16, the correct option is D.

We are given that;

Mean=79

Standard deviation=7

Now,

To calculate the probability for a normal distribution, you need to convert the raw score x into a standard score z using the formula z = (x - mean) / standard deviation12. Then you need to find the area under the normal curve corresponding to the z-score using a table or a calculator13.

The z-score for x = 86 is:

z = (86 - 79) / 7 = 1

Using a table or a calculator, we can find that the area under the normal curve to the left of z = 1 is about 0.8413. This means that P(x < 86) ≈ 0.8413.

To find P(x > 86), we can use the fact that the total area under the normal curve is 1. So, P(x > 86) = 1 - P(x < 86) ≈ 1 - 0.8413 = 0.1587.

Therefore, by the given mean the answer will be 0.16.

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PLS HELP ASAP THANKS

Answers

The x-value of the vertex of the given quadratic equation is -2.

How to find the x value of the vertex

Quadratic equation in standard vertex form is written as:

f(x) = a(x - h)^2 + k

Definition of parameters

a is the coefficient of the quadratic term, and (h, k) represents the coordinates of the vertex of the parabola.

In the given equation:

7(x + 2)^2 - 7

We can see that

a = 7

h = -2

k = -7

f(x) = 7(x - (-2))^2 - 7

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de la setmane - 4 IND und Finder Watu The OL OC ADOS CH a. Assume that a similar boat is loaded with 70 passengers and assume that the weights of people are normally distributed with a means of 178.2 lb and a standard deviation of 39 2. Find the The probability s (Round to four decimal places as needed) b. The boat was later rated to carry only 16 passengers, and the load limit was changed to 2,736 Ib. Find the probability that the boot is overloaded because the mean weight of the passenger The probability in (Round to four decimal places as needed) Do the new ratings appear to be safe when the boat is loaded with 16 passengers ? Choose the correct answer below CA Because there is a high probability of overloading, the new ratings appear to be safe when the boat is loaded with 16 passengers OB. Because the probability of overloading is lower with the new ratings than with the old ratings, the new ratings appear to be safe OC. Because there is a high probability of overloading, the new ratings do not appear to be safe won the boat is loaded with 16 passengers OD. Because 1782 is greater than 171, the new ratings do not appear to be safe when the boat is loaded with 16 passengers. aviation of 30.2 lb. Find the probability that the boot is overloaded because the 70 passengers we amoun night greater than 140 lb weight of the passengers is greater than 171 (so that their total weight is greater than the maximum capacity of 2.736 lb) Chrome Siassi Test3/5 mylab, pearson.com/Student/Player Test.aspx?testid=238646918&centerwinyes 2022SpringSTA202312week-int55 Test: SiassiTest#3/5 A boat capsized and sank in a lake. Based on an assumption of a mean weight of 140 lb, the boat was rated to carry 70 passengers (so the load limit wa fiume that mir hataloadedanih 70 scancers and assume that the weight of people are normally distributed with a mean of 78.2 Ib and Valerie Leon 04/02/22 8:00 PM Submit test Question 4 of 20 This test: 180 point(s) possible This question: 9 point(s) possible so the load limit was 9,800 1b). Alter the boat sank, the assumed mean weight for similar boats was changed from 140 th to 171 lb. Complete parts a and b below man of 1782 lb and a standard deviation of 392 tb. Find the probability that the boat is overlanded because the 70 passengers have a means weight grouter than 140 . is overloaded because the mean weight of the passengers is greater than 171 (so that their total weight is greater than the maximum capacity of 2.736) nes

Answers

The correct answer is option B: "Because the probability of overloading is lower with the new ratings than with the old ratings, the new ratings appear to be safe when the boat is loaded with 16 passengers."

a) Using the given mean and standard deviation, we can standardize the weight of the passengers to find the z-score:

z = (x - μ) / σ

z = (178.2 - 140) / 39.2

z = 0.9719

Using a standard normal distribution table or calculator, we can find the probability of a z-score greater than 0.9719:

P(z > 0.9719) = 1 - P(z <= 0.9719) = 1 - 0.8349 = 0.1651

So the probability that the boat is overloaded because the mean weight of the 70 passengers is greater than 140 lb is 0.1651.

b) The new load limit is 2,736 lb, which means the average weight per passenger should be no more than 2736/16 = 171 lb. We can standardize the weight of the passengers again:

z = (171 - 178.2) / (39.2 / sqrt(16))

z = -2.3155

Using a standard normal distribution table or calculator, we can find the probability of a z-score less than -2.3155:

P(z < -2.3155) = 0.0104

So the probability that the boat is overloaded because the mean weight of the 16 passengers is greater than 171 lb is 0.0104.

Since the probability of overloading is lower with the new ratings than with the old ratings, the new ratings appear to be safe when the boat is loaded with 16 passengers. Therefore, the correct answer is option B: "Because the probability of overloading is lower with the new ratings than with the old ratings, the new ratings appear to be safe when the boat is loaded with 16 passengers."

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The chart below represents data collected from 10 eighth grade boys
showing their height in inches and their weight in pounds.
Height
(inches)
60 63 65 61 70 55 58 61 64 57
Weight
(pounds) 125 139 155 136 170 108 116 139 129 121
Which statement best describes the association between height and
weight of the ten boys?
A. The data shows a negative, linear association.
B. The data shows a positive, linear association.
C. The data shows a non-linear association.
D. The data shows no association.

Answers

B. The data shows a positive, linear association.

To determine the association between height and weight of the ten boys, we will first observe the data points provided. We can compare the increase or decrease in height with the corresponding increase or decrease in weight to identify a pattern.

Here's a list of height and weight pairs:
(60, 125), (63, 139), (65, 155), (61, 136), (70, 170), (55, 108), (58, 116), (61, 139), (64, 129), (57, 121)

Upon observing these pairs, we can see that as height increases, weight generally increases as well. For example, when height increases from 55 inches to 70 inches, weight increases from 108 pounds to 170 pounds. This pattern can also be seen in other data pairs.

This means that there is a direct relationship between the height and weight of the boys, where taller boys tend to weigh more, and shorter boys tend to weigh less.

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the lengths of full-grown scorpions of a certain variety have a mean of 1.96 inches and a standard deviation of 0.08 inch. assuming the distribution of the lengths has roughly the shape of a normal disribution, find the value above which we could expect the longest 20% of these scorpions.

Answers

We can expect the longest 20% of these scorpions to be above a length of approximately 2.0272 inches.

To find the value above which we could expect the longest 20% of these scorpions, we need to use the z-score formula. First, we need to find the z-score that corresponds to the 80th percentile, which is the complement of the top 20%. Using a standard normal distribution table or calculator, we find that the z-score corresponding to the 80th percentile is 0.84.

Next, we use the formula z = (x - mu) / sigma, where z is the z-score, x is the value we are trying to find, mu is the mean, and sigma is the standard deviation. We plug in the given values and solve for x:

0.84 = (x - 1.96) / 0.08

0.0672 = x - 1.96

x = 2.0272

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Let E be the region bounded below by the cone z = – (x2 + y²) and above by the sphere 102 – x2 - y2 . Provide an answer accurate to at least 4 significant digits. Find the volume of E.

Answers

The volume of E is 0.

We need to find the volume of the region E bounded below by the cone z = –(x^2 + y^2) and above by the sphere 102 – x^2 – y^2.

To find the limits of integration, we need to solve for z in terms of x and y:

z = –(x^2 + y^2)

z + x^2 + y^2 = 0

x^2 + y^2 = –z

And for the sphere:

102 – x^2 – y^2 = z

102 = x^2 + y^2 + z

Substituting x^2 + y^2 = –z in the equation for the sphere, we get:

102 = –z + z

102 = 0

This is impossible, so there is no intersection between the cone and the sphere, and the volume of E is zero.

Therefore, the volume of E is 0.

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The coordinates of points A and B are A(4, -2) and B(12, 10). What are the coordinates of the point that is of the way from A to B?
A (1,-0.5)
B. (6, 1)
C. (10,7)
D. (3,2.5)

Answers

Answer:

To find the point that is halfway between A(4, -2) and B(12, 10), we can find the average of the x-coordinates and the average of the y-coordinates.

average x-coordinate = (4 + 12)/2 = 8 average y-coordinate = (-2 + 10)/2 = 4

Therefore, the point that is halfway between A and B has the coordinates (8, 4), which is answer choice B.

Step-by-step explanation:

Bianca invested $6,500 at an interest rate of 3%. How much will the simple interest be in 8 years?
Please help

Answers

Answer:

$1,560

Steps:

To calculate simple interest, we use the formula:

Simple interest = Principal * Rate * Time

Given that Bianca invested $6,500 at a rate of 3%, the principal is $6,500 and the rate is 0.03 (since 3% is equivalent to 0.03 as a decimal).

We are asked to find the simple interest after 8 years, so the time is 8 years.

Using the formula, we get:

Simple interest = $6,500 * 0.03 * 8

Simple interest = $1,560

Therefore, the simple interest on Bianca's investment will be $1,560 after 8 years.

in a certain lottery, you must choose three numbers: any number between 1 and 10; any number between 1 and 20; and any number between 1 and 30. numbers may repeat and order matters (e.g., 5-5-5 is allowed; and 5-9-30 is different than 9-5-30). how many different lottery picks are there? enter as a whole number.

Answers

Answer: 6000

Step-by-step explanation:

For the numbers you choose, there are 10, then 20, then 30 possible numbers to choose from.

To find the total amount of possible combinations with repetition, you just do 10x20x30 = 6000.

Answer this question You want to estimate the first derivative of f(x), given values of the function at discrete points x = 0, 0.1, 0.2, ..., 1. Which of these formulas is appropriate for estimating f'(1) if h > 0? 2h Select the correct answer A none B f'(x) =3f(x)+4 f(x +h)-f(x+2h)/2h C f'(x) =-3f(x)+4 f(x -h)-f(x-2h)/2h D f'(x)=f(x+h)-f(x-h) E f'(x) = f[(x+h)-f(x+2h)/ 2h

Answers

The appropriate formula for estimating f'(1) if h > 0 is D, which is f'(x) = f(x+h) - f(x-h). This is because the formula uses the values of the function at two points that are equidistant from the point at which the derivative is being estimated, which is x=1 in this case. Additionally, this formula uses a discrete difference approach, which is appropriate for estimating derivatives given discrete data points.

The step size h between the data points is defined as h = 1/n, where n is the number of discrete data points for the function f(x) for values of x from 0 to 1.

We must determine the values of the function at x = 1+h and x = 1-h in order to estimate the first derivative of f(x) at x = 1 using the central difference approach.

Depending on where the data points are located, we can extrapolate or interpolate using the given data points to predict the function value at x = 1+h and x = 1-h.

Once we know the values of the function at x = 1+h and x = 1-h, we may estimate the first derivative at x = 1 using the central difference approach and the formula D, which is f'(x) = f(x+h) - f(x-h).

The value of h should be big enough to prevent rounding errors while still being small enough to offer an accurate approximation of the derivative. H typically has a value of 0.001.

This formula only applies to smooth functions; it may not be effective for functions with abrupt corners or discontinuities. This is a crucial point to remember. Other techniques for determining the derivative might be more suitable in such circumstances.

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Find the missing angle.

Answers

The measure of the missing angle in the right triangle rounded to the nearest 10 or the tens Place is 20°.

What is the measure of the missing angle?

The figure in the image is a right triangle.

Measure of missing angle = θ

Opposite to angle θ = 8

Adjacent to angle θ  = 20

To solve for the missing angle, we use the trigonometric ratio.

Note that: tangent = opposite / adjacent

Hence:

tangent θ = opposite / adjacent

tan(θ) = 8/20

tan(θ) = 2/5

Take the tan inverse

θ = tan⁻¹( 2/5 )

θ = 21.8014°

Rounding to the nearest 10 or the tens Place.

θ = 20°

Therefore, the missing angle is 20°.

Option C) 20° is the correct answer.

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44 students complete some homework and the histogram shows information about the time taken. work out the estimate of the interquartile range. in the working you must show the upper and lower quartiles.

Answers

It can be seen that the range is 19 minutes  

How to solve

From the given data, we can see:

1.4 × 5 = 7

0.8 × 10 = 8

1.4 × 10 = 14

1 × 15 = 15

15 + 14 + 8 + 7 = 44

44 ÷ 4 = 11

LQ of 44=11

LQ = 10 minutes

11 × 3 = 33 UQ = 29 minutes

Therefore, it can be seen that the range is 19 minutes  

Range is the aggregate of conceivable output values in a function. Any inputs within its domain can be used to compute the range, which is viewed as a pivotal aspect when assessing the behavior and properties of functions. Additionally, it is regularly incorporated in describing the spread and variability of data sets in statistics.

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