AP STATS HELP ANSWER RIGHT NOW PLS THANK YOU

AP STATS HELP ANSWER RIGHT NOW PLS THANK YOU

Answers

Answer 1

None explains the use of 0.5 for the most conservative sample size. Thus E is the correct one.

What is confidence interval?

A confidence interval is a range of values that is likely to contain the true population parameter, and a wider confidence interval allows for a greater chance of accurately capturing the true population parameter.

The use of 0.5 as an estimate of the sample proportion is most conservative because it produces the widest confidence interval.

A larger sample size is generally used when the confidence interval is wider, as it improves the precision of the estimate.

Using 0.5 as the estimated proportion will produce the widest confidence interval and thus, a larger sample size.

This is why 0.5 is used to calculate the most conservative sample size.

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Related Questions

Does the function model exponential growth or decay? g ( t ) = 1.7 ⋅ 0. 8 t

Answers

The answer of the given question based on function is  g(t) = 1.7 * 0.8^t models exponential decay.

What is Exponential decay?

Exponential decay is a type of mathematical function that represents a process in which the value of a quantity decreases over time or through a series of events at a constant proportional rate. In exponential decay, the rate of decrease is proportional to the current value of the quantity.

Exponential decay is often modeled by the following equation:

y = a * e^(-kt)

The function g(t) = 1.7 * 0.8^t models exponential decay.

In this function, the base of the exponent is 0.8, which is a number between 0 and 1. When a base of an exponential function is between 0 and 1, it represents exponential decay. This means that as the value of t increases, the value of g(t) decreases at an increasingly rapid rate.

Additionally, the coefficient of the exponent (1.7 in this case) represents the initial value of the function. Since the coefficient is positive, the initial value is also positive. Therefore, the function represents exponential decay from a positive initial value.

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Drop down 1 drop 2 = AOB or BOD
Drop3 = angles addition postulate, d definition of complementary angles, addition, property of equality, definition of perpendicular line segments

Answers

There is a missing step between step 8 and 9 because the student did not state that m∠BOC + m∠COD = m∠BOD. This statement is true because of the angles addition postulate.

What is angles addition postulate?

The Angle Addition Postulate states that if point P lies in the interior of angle ∠RST, then the measure of ∠RST is equal to the sum of the measures of ∠RSP and ∠PST. In other words, for any angle ∠RST with point P in its interior, says that m∠RST = m∠RSP + m∠PST.

The Angle Addition Postulate is used in geometry to find the measures of angles that are formed by two intersecting lines or when a point is located in the interior of an angle.

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Image transcribed:

Select the correct answer from each drop-down menu.

Given: ∠BOC and ∠COD are complementary angles

lines BO intersects lines AD at point O

Prove: ∠AOB ≅∠BOD

Statements--|--Reasons

1. ∠BOC and ∠COD are complementary angles; BO intersects AD at point O--|--1. given

2. m∠BOC+ m∠COD = 90°--|--2. definition of complementary angles

3. substitution property of equality--|--3. m∠BOD 90°

4. ∠AOB and ∠BOD are supplementary angles--|--4. linear pair theorem

5. m∠AOB + m∠BOD = 180°--|--5. definition of supplementary angles

6. m∠AOB+90° = 180°--|--6. substitution property of equality

7. m∠AOB = 90°--|--7. subtraction property of equality

8. m∠AOB = m/BOD--|--8. substitution property of equality

9. ∠AOB∠ BOD--|--9. definition of congruent angles

There is a step missing in the proof. Identify where in the proof there is a missing step and what this step should be.

There is a missing step between _______ (options 8. and 9.,1. and 2., 2 and 3., 4. and 6.)because the student did not state m∠BOC+m∠COD - m∠______  (options AOB or BOD). This statement is true because of the _____ (options angles addition postulate, d definition of complementary angles, addition, property of equality, definition of perpendicular line segments)

Choose the three true statements about the angles in the figure

Answers

Answer-

answer marked on the picture

Step-by-step explanation:

angle 1 and 55 is not vertical angles thus is the wrong answer

angle 2 can be determined with the given info by subtracting the other two angles to 180

Angle 2 not equal to 125 as the angles are not supplementary from each other

Solve the equation for the specified variable.

Answers

24.08

Multiply both sides by 4

Simplify −1.48×4 to −5.92

Add 30 to both sides.

Simplify −5.92+30 to 24.08

You randomly survey students about whether they play a sport or a musical instrument. Of 110 students who play a sport, 46 play an instrument. Of 140 students who do not play a sport, 61 play an instrument. Organize the results in a two-way table. Include the marginal frequencies.

Answers

Answer:

Step-by-step explanation:

A university is trying to determine what price to charge for tickets to footbal games. At a price of $20 per ticket, attendance averages 40,000 people per game. Every decrease of $5 adds 10,000 people to the average number.
Every person at the game spends an average of $5.00 on concessions. What price per ticket should be charged in order to maximize revenue? How many people will attend at that price?

Answers

The price that maximizes revenue is $10 per ticket, which will bring in $1,500,000 in revenue. 60,000 people will attend at that price.

What is price?

Price is the amount of money that is required to purchase or obtain a good or service. It is a numerical value that is assigned to a particular product or service and is used to indicate its value in the market. The price of a product or service is determined by a variety of factors, including the cost of production, supply and demand, competition, and market conditions.

In the given question,

To maximize revenue, we need to find the price per ticket that will bring in the greatest total revenue. Let's start by figuring out how many people will attend at various price points:

At $20 per ticket, 40,000 people attend.

At $15 per ticket, 50,000 people attend.

At $10 per ticket, 60,000 people attend.

At $5 per ticket, 70,000 people attend.

Now we can calculate the total revenue at each price point:

At $20 per ticket, revenue is 40,000 × $20 + 40,000 × $5 = $1,000,000.

At $15 per ticket, revenue is 50,000 × $15 + 50,000 × $5 = $1,250,000.

At $10 per ticket, revenue is 60,000 × $10 + 60,000 × $5 = $1,500,000.

At $5 per ticket, revenue is 70,000 × $5 + 70,000 × $5 = $700,000.

From these calculations, we can see that the price that maximizes revenue is $10 per ticket, which will bring in $1,500,000 in revenue. 60,000 people will attend at that price.

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2. Use the Factor Theorem to determine if (x-4) is a factor of the polynomial function
P(x) = x5 + 4x4 - 17x³ - 60x²
Clearly state that (x-4) is a factor, or that (x-4) is not a factor. Show all work.

Answers

Answer:

Yes, (x - 4) is a factor of polynomial function P(x) = x⁵ + 4x⁴ - 17x³ - 60x².

Step-by-step explanation:

The Factor Theorem states that if f(x) is a polynomial, and f(a) = 0, then (x - a) is a factor of f(x).

Therefore, according to the Factor Theorem, if (x - 4) is a factor of P(x) then P(4) = 0.

To determine if (x - 4) is a factor of P(x), substitute x = 4 into the function and solve.

[tex]\begin{aligned}x=4 \implies P(4)&=(4)^5+4(4)^4-17(4)^3-60(4)^2\\&=1024+4(256)-17(64)-60(16)\\&=1024+1024-1088-960\\&=2048-1088-960\\&=960-960\\&=0\end{aligned}[/tex]

As P(4) = 0, this confirms that (x - 4) is a factor of polynomial function P(x) = x⁵ + 4x⁴ - 17x³ - 60x².

[tex]\hrulefill[/tex]

Additional comments

The fully factored form of the given polynomial function is:

[tex]P(x)=x^2\left(x+3\right)\left(x-4\right)\left(x+5\right)[/tex]

please help immediately

Answers

The numbers which replaces the capital letters are A is -1, B is 1, C is 3, D is 0, E is 5 and F is -2.

What is logarithm?

A logarithm is a mathematical function that measures the relationship between two quantities, by expressing one quantity in terms of another. More specifically, a logarithm is the power to which a base must be raised to produce a given number.

According to question:

a) [tex]2^(A) * 2^(B) = 2^0[/tex] can be rewritten as [tex]2^(A+B) = 2^0[/tex].

To find the values of A and B, we need to solve the equation [tex]2^(A+B) = 2^0\\[/tex].

Since [tex]2^0[/tex] = 1, we have [tex]2^(A+B)[/tex] = 1, which means A + B = 0. One possible solution is A = -1 and B = 1, since (-1) + 1 = 0.

Therefore, the equation becomes [tex]2^(-1) * 2^1 = 2^0[/tex], which is true.

(A) = -1

(B) = 1

b) [tex](2^3)/(2^(C)) = 2^(D)[/tex] can be simplified as [tex]2^(3-C) = 2^(D)[/tex].

To find the values of C and D, we need to set the exponents equal to each other. So, we have 3 - C = D, which means C = 3 - D.

One possible solution is C = 3 and D = 0, since 3 - 0 = 3.

Therefore, the equation becomes [tex](2^3)/(2^3) = 2^0[/tex], which is true.

(C) = 3

(D) = 0

c) [tex]2^(-3) * (E)^(-3) = 10^(F)[/tex] can be rewritten as [tex](1/2^3) * (1/E^3) = 10^F[/tex]. Multiplying both sides by [tex]2^3 * E^3[/tex], we get [tex]1 = 10^F * 2^3 * E^3[/tex].

Taking the logarithm of both sides, we get log(1) = [tex]log(10^F * 2^3 * E^3)[/tex]. Since log(1) = 0, we have 0 = F log(10) + 3log(2) + 3log(E), which simplifies to F = -2 - 3log(E)/log(10) with one possible solution of E = 5 and F = -2. Therefore, the equation becomes [tex]2^(-3) * 5^(-3) = 10^(-2)[/tex], which is true.

(E) = 5

(F) = -2

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Find the length of the segment indicated. Round your answer to the nearest tenth if necessary. (Please show step by step on how to figure this out! I want to understand!)

Answers

By pythagorean theorem, 21.095 is the length of the segment indicated..

What is the Pythagorean theorem in plain English?

The Pythagorean Theorem states that the squares on the hypotenuse of a right triangle, which is the side that faces the right angle, are equal when added together. This is written as a2 + b2 = c2 in the usual algebraic notation.

  In triangle we apply pythagorean theorem

    x² = 11.8² + 17.5²

         = 139.24 +  306.25

     x   = √445.49

      x = 21.095

     

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Helppp ASAP, what is a conjecture for this

Answers

I don’t know what a conjecture is but I recognize the pattern:

In the middle of every black triangle, a white, upside down triangle is added.

I need help with this

Answers

Answer:

g(0)= -1/3

g(-1)=0

g(1)=-1

g(2)=-3

g(3)=∞

Step-by-step explanation:

g(0)= -1/3

g(-1)=0

g(1)=-1

g(2)=-3

g(3)=∞

Show that f(x) can be written as Px2+Qx+R+Vx+3+Wx-5and find the values of P, Q, R, Vand W.

Answers

f(x) = (3/2)*x² + (13/2)*x - 5/2 - 6/(x + 3) + 15/(x - 5)

and the values of P = 3/2, Q = 13/2, R = -5/2, V = -6, W = 15

What is the fraction?

A fraction is a number that represents a part of a whole or a ratio between two quantities. It is written with a numerator (the top number) and a denominator (the bottom number) separated by a horizontal line. The numerator represents the number of parts being considered, while the denominator represents the total number of parts that make up a whole unit.

First, let's factor in the denominator of the given function:

x² - 2x - 15 = (x - 5)(x + 3)

Now we can use partial fraction decomposition to express the given function as the sum of simpler fractions:

f(x) = (x⁴ + 2x³ - 29x² - 47x + 77) / (x² - 2x - 15)

= (x⁴ + 2x³ - 29x² - 47x + 77) / ((x - 5)(x + 3))

= (Px² + Qx + R) + V/(x + 3) + W/(x - 5)

where P, Q, and R are constants to be determined, and V and W are constants to be determined as well.

To find the values of P, Q, and R, we can use polynomial long division to divide the numerator by the denominator:

        x² + 5x - 2

x² - 2x - 15 | x⁴ + 2x³ - 29x² - 47x + 77

- (x⁴ - 2x³ - 15x²)

----------------------

4x³ - 14x² - 47x

- (4x³ - 8x² - 60x)

------------------

-6x² + 47x

- (-6x² + 12x + 90)

--------------

35x - 90

Therefore,

f(x) = (x⁴ + 2x³ - 29x² - 47x + 77) / (x² - 2x - 15)

= x² + 5x - 2 - (6x² - 35x + 90) / ((x - 5)(x + 3))

= -5/2 + (13/2)x + (3/2)x² + V/(x + 3) + W/(x - 5)

Comparing this to the given form, we can see that:

P = 3/2

Q = 13/2

R = -5/2

V = -6

W = 15

Therefore, we have:

f(x) = (3/2)*x² + (13/2)*x - 5/2 - 6/(x + 3) + 15/(x - 5)

and the values of P = 3/2, Q = 13/2, R = -5/2, V = -6, W = 15

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Can someone tell me if I did this correctly? Find the value of x and simplify to radical form and explain if I got it wrong (which I probably did)

Answers

Answer:

Step-by-step explanation:

SOHCAHTOA    [tex]sin =\frac{opp}{hyp} ,cos=\frac{adj}{hyp} ,tan=\frac{opp}{adj}[/tex]

[tex]sin60=\frac{x}{8}[/tex]

[tex]x=8sin60=8\frac{\sqrt{3} }{2} =4\sqrt{3}[/tex]

Abbey is getting new carpet in her living room and hallway. The following diagram shows the two together. Note: Figure not drawn to scale If a = 34 ft, b = 13 ft, c = 17 ft, and d = 17 ft, what is the area of the living room and hallway together?

Answers

Therefore, the combined area of the living room and hallway is 731 square feet.

What is area?

In geometry, the term "area" refers to the measurement of the size of a two-dimensional surface. It is typically measured in square units, such as square meters or square feet. The area of a shape can be found by multiplying its length by its width or by using other specific formulas that depend on the shape itself. Some common examples of shapes for which we might want to calculate the area include squares, rectangles, triangles, circles, and irregular polygons.

by the question.

The area of the living room can be calculated as:

[tex]Area of living room = length x width\\Area of living room = a x b\\Area of living room = 34 ft x 13 ft\\Area of living room = 442 sq ft[/tex]

The area of the hallway can also be calculated using the same formula:

[tex]Area of hallway = length x width\\Area of hallway = c x d\\Area of hallway = 17 ft x 17 ft\\Area of hallway = 289 sq ft[/tex]

To find the total area of the living room and hallway together, we simply add the two areas:

[tex]Total area = Area of living room + Area of hallway\\Total area = 442 sq ft + 289 sq ft\\Total area = 731 sq ft[/tex]

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An archway is shown. A semicircle top arch sits on two rectangular pillars. The rectangular pillars are 3 meters wide. The distance between the 2 pillars is 6 meters. The rectangular pillars have a height of 4 meters.
Determine the area of the archway with a semicircle top arch and two rectangular pillars.


The lower supports are
and the area of the two supports is
square meters.

The upper arch can be decomposed as one semicircle with radius
meters minus a semicircle with radius 3 meters.

The area of the archway is (
π + 24) square meters.

Answers

The area of the archway is (π + 24) square meters, as the total area of the two rectangular pillars is 24 square meters, area of semicircle is (9π) / 2 square meters.

What is radius?

Radius is a term used in geometry to refer to the distance from the center of a circle or sphere to its edge. It is usually represented by the symbol "r". In a circle, all points on the edge, also called the circumference, are at the same distance from the center. This distance is equal to the radius. The radius is half the length of the diameter, which is the distance across the circle passing through its center.

To determine the area of the archway, we need to calculate the area of the two rectangular pillars and the semicircle top arch, and then add them together.

The area of each rectangular pillar is:

Area of each pillar = length x width

= 4 meters x 3 meters

= 12 square meters

So the total area of the two rectangular pillars is:

Total area of pillars = 2 x 12 square meters

= 24 square meters

Now we need to calculate the area of the semicircle top arch. The radius of the semicircle is half of the distance between the two pillars, which is:

Radius of semicircle = (6 meters / 2) = 3 meters

The area of the semicircle is:

Area of semicircle = (π x r²) / 2

= (π x 3²) / 2

= (9π) / 2 square meters

We also need to subtract the area of the rectangle sections at the top of each pillar from the semicircle to get the area of the archway. Each of these rectangles has a length of 3 meters and a height of the difference between the radius of the semicircle and the height of the pillars, which is:

Height of rectangle = (3 meters - 4 meters) = -1 meter

Since we can't have a negative height, we take the absolute value of this difference:

|Height of rectangle| = 1 meter

The area of each rectangle is:

Area of each rectangle = length x width

= 3 meters x 1 meter

= 3 square meters

So the total area of the two rectangles is:

Total area of rectangles = 2 x 3 square meters

= 6 square meters

Therefore, the area of the archway is:

Area of archway = Area of pillars + Area of semicircle - Area of rectangles

= 24 square meters + (9π) / 2 square meters - 6 square meters

= (π + 24) square meters

Hence, the area of the archway is (π + 24) square meters.

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Which statement describes the relationships between x and y in these two equations? y = 10x y = x + 10

Answers

Answer is

In y = 10x, the value of y is 10 times the value of x.
In y= x + 10, the value of y is 10 more than the value of x.

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. If P = 2x² + 3xy-5y², Q=-5x² +2xy + 3y² and R=-3x² + 5xy - 2y^2, show that P+Q-R=0.​

Answers

Answer:

Step-by-step explanation:

[tex]P+Q-R=(2x^2+3xy-5y^2)+(-5x^2+2xy+3y^2)-(-3x^2+5xy-2y^2)[/tex]

                  [tex]=2x^2+3xy-5y^2-5x^2+2xy+3y^2+3x^2-5xy+2y^2[/tex]

                  [tex]=2x^2-5x^2+3x^2-5y^2+3y^2+2y^2+3xy+2xy-5xy[/tex]

                  [tex]=0[/tex]

Answer:

To show that P + Q - R = 0, we need to substitute the expressions for P, Q, and R into the equation and simplify.

P + Q - R = (2x² + 3xy - 5y²) + (-5x² + 2xy + 3y²) - (-3x² + 5xy - 2y²)

Simplifying the brackets on the right-hand side:

P + Q - R = 2x² + 3xy - 5y² - 5x² + 2xy + 3y² + 3x² - 5xy + 2y²

Grouping like terms together:

P + Q - R = (2x² - 5x² + 3x²) + (3xy + 2xy - 5xy) + (-5y² + 3y² + 2y²)

Simplifying the expressions in the brackets:

P + Q - R = 0x² + 0xy + 0y²

Therefore, P + Q - R = 0.

A company's daily profit from the production and sale of electrical components can be described by the equation P(x)=6.30x-1,777 dollars, where x is the number of units produced and sold. What level of production and sales will give a daily profit of more than $8,9337

Answers

Answer:1,777...)-(1,555)= B)1,333...+4,666

Step-by-step explanation:1,777...)-(1,555)= B)1,333...+4,666

Write a function based on the given parent function and transformations in the given order.

Parent function:

() Shift units to the left.

() Stretch horizontally by the factor of .

() Reflect across the -axis.

Answers

The function based on the given parent function and transformations in the given order would be:

f(x)= -1/2√(x+2)

What is a function?

Functions are often represented as equations, graphs, or tables, and they are used to model a wide range of real-world phenomena. For example, a function might describe the relationship between the time of day and the temperature outside, or the amount of money earned based on the number of hours worked.

Let's break down how each transformation affects the parent function:

Shifting units to the left: This transformation involves replacing the variable "x" with "x+2" in the parent function. This has the effect of shifting the graph 2 units to the left. The function becomes:

f(x)= √(x+2)

Stretching horizontally: This transformation involves replacing "x" with "2x" in the function obtained after the first transformation. This has the effect of stretching the graph horizontally by a factor of 1/2. The function becomes:

f(x)= √(2x+4)

Reflecting across the x-axis: This transformation involves multiplying the entire function by -1. This has the effect of reflecting the graph across the x-axis. The function becomes:

f(x)= -√(2x+4)

So the final function based on the given parent function and transformations in the given order is:

f(x)= -1/2√(x+2)

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X =
Solve for x,
using the secant lines.
[?
8 cm
20 cm
X
13 cm
Round to the
nearest tenth.
cm_ Remember: a·b= c.d
Enter

Answers

Using the formula for lines intersecting in a circle, we get the value of x to be = 32.5cm.

What are lines inside circle?

A diameter is a line segment that traverses a circle by going through its centre.

The radius is twice as long as the diameter.  A chord is a segment that does not have to pass through the centre and has endpoints on the circle.

We know that in a circle when lines are intersecting each other than the lines divided are in the formula:

a × b = c × d

Here,

13 × 20 = 8 × x

⇒ x = 260/8

⇒ x = 32.5cm.

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Question 10
With the points A(6, 2) B(-4,-4)
C(-8, 12) D(2, -8).
What are the new points if the scale factor of dilation is 1/2?

Answers

Answer:

A'(3, 1); B'(-2, 2); C'(-4, 6); D'(1, -4)

-----------------------------------

The scale factor k affects the points with the rule:

(x, y) → (kx, ky)

Apply the rule to the given points, given k = 1/2:

A(6, 2) → A'(3, 1);B(-4, 4) → B'(-2, 2);C(-8, 12) → C'(-4, 6);D(2, -8) → D'(1, -4)

Antiderivative of
(tan^-x× e^tan^-1x)/(1+x^2) ​

Answers

Let u = tan⁻¹x, then du/dx = 1/(1+x²).

Using the formula for the derivative of inverse tangent, we have:

tan(u) = x

sec²(u) du/dx = 1

du/dx = cos²(u)

Substituting into the original expression, we get:

∫(tan⁻¹x × e^tan⁻¹x)/(1+x²) dx = ∫(tan⁻¹x × e^u × cos²(u)) du

Using integration by parts with u = tan⁻¹x and dv = e^u × cos²(u) du, we get:

v = (1/2) e^u (sin(u) + u cos(u))

∫(tan⁻¹x × e^u × cos²(u)) du = (1/2) e^u (sin(u) + u cos(u)) tan⁻¹x - ∫[(sin(u) + u cos(u)) / (1+x²)] dx

Substituting back u = tan⁻¹x, we get:

∫(tan⁻¹x × e^tan⁻¹x × cos²(tan⁻¹x)) dx = (1/2) e^tan⁻¹x (x sin(tan⁻¹x) + cos(tan⁻¹x)) tan⁻¹x - ∫[(x cos(tan⁻¹x) + sin(tan⁻¹x)) / (1+x²)] dx

Using the identity sin(tan⁻¹x) = x / √(1+x²) and cos(tan⁻¹x) = 1 / √(1+x²), we simplify the expression to:

∫(tan⁻¹x × e^tan⁻¹x × cos²(tan⁻¹x)) dx = (1/2) x e^tan⁻¹x + (1/2) ∫[e^tan⁻¹x / (1+x²)] dx

The remaining integral can be solved using another substitution with v = tan⁻¹x, which results in:

∫(tan⁻¹x × e^tan⁻¹x × cos²(tan⁻¹x)) dx = (1/2) x e^tan⁻¹x + (1/2) ln(1+x²) + C, where C is the constant of integration

If the area of a square equals 121sq inches, what is the perimeter?

Answers

Answer: 44

Step-by-step explanation: So, if the area of a square is 121 sq. in, the sides that could be multiplied to get 121 are 11 x 11. Then, you multiply by four to get the perimeter.

15 points will mark as brainlist !! please help

Answers

Angle 1 and the angle of 38° lie on the transversal, and thus they are supplementary because the angle of a straight line is always 180.° Angle 1 and the 38° angle form the 180° angle for the line.

This, we can form the following equation to find the measure of angle 1:

38°+∠1=180°

Subtract 38 from both sides:

∠1=180-38

∠1=142°

Now, we know the measure of angle 1. Angle 1 and angle 5 are alternating interior angles. By the Alternate Interior Angles Theorem, alternate interior angles are always congruent.

Therefore, ∠1=∠5; 142°=∠5

Answer: m∠5=142°

Assume that the Poisson distribution applies and that the mean number of hurricanes in a certain area is 7.7 per year. a. Find the probability​ that, in a​ year, there will be 5 hurricanes. b. In a 45​-year ​period, how many years are expected to have 5 ​hurricanes? c. How does the result from part​ (b) compare to a recent period of 45 years in which 4 years had 5 ​hurricanes? Does the Poisson distribution work well​ here?

Answers

if the probability of observing 4 or fewer years with 5 hurricanes is much lower (e.g., less than 5%), then we might conclude that the Poisson distribution does not work well for this particular scenario.

What is the role of Poisson distribution?

a. The probability of observing 5 hurricanes in a year can be calculated using the Poisson distribution formula:

[tex]P(X=5) = (e^(-λ) * λ^5) / 5![/tex]

where λ is the mean number of hurricanes per year. In this case [tex], λ = 7.7[/tex] . Thus,

[tex]P(X=5) = (e^(-7.7) * 7.7^5) / 5! = 0.0834[/tex]   (rounded to four decimal places)

Therefore, the probability of observing 5 hurricanes in a year is approximately  [tex]0.0834[/tex] or   [tex]8.34[/tex] %.

b. The number of hurricanes in a 45-year period follows a Poisson distribution with mean [tex]λ = 7.7 \times 45 = 346.5[/tex] . The expected number of years with 5 hurricanes in a 45-year period is then:

[tex]E(X) = λ = 346.5[/tex]

Therefore, we expect about [tex]346.5/45 ≈ 7.7[/tex] % or 8 years out of 45 to have 5 hurricanes.

c. If in a recent period of 45 years, only 4 years had 5 hurricanes, we can compare this to the expected number of years with 5 hurricanes based on the Poisson distribution. Using the same mean λ = 346.5, we can calculate the probability of observing 4 or fewer years with 5 hurricanes in a 45-year period:

[tex]P(X ≤ 4) = Σ(i=0 to 4) [(e^(-λ) * λ^i) / i!] ≈ 0.2088[/tex]

This means that there is about a 20.88% chance of observing 4 or fewer years with 5 hurricanes in a 45-year period, based on the Poisson distribution with [tex]λ = 346.5[/tex]  .

Therefore,  This is not a very low probability, so the observed 4 years with 5 hurricanes in the recent [tex]45[/tex]  -year period is not necessarily inconsistent with the Poisson distribution.

Learn more about Poisson here:

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Morgan like and newton are 24 miles apart on a map the two cities are 3 inches apart what is the map scale

Answers

Answer:

8 mi per in.

Step-by-step explanation:

Divide 24 mi by 3 in. to get base number of 1 in. per x mi

24/3 = 8

8 mi per in.

A bag contains 3 gold marbles, 26 silver marbles, and 28 black marbles. Someone offers to play this game: You randomly select on marble from the bag. If it is gold, you win $3. If it is silver, you win $2. If it is black, you lose $1. What is your expected value if you paid $1 to play this game?

Answers

3+26+28 = 57

chance of gold is 3/57

chance of silver = 26/57

chance of black = 28/57

the expected value of playing this game = a weighted average of the winnings (or losses) multiplied by the odds of winning: (3/57)3  +  (26/57)2 + (28/57)(-1) = 9/57 + 54/57 - 58/57 = 60/57 -58/17 = 2/57 = about 0.578 winnings = $0.578 = 0.58 cents

You will win 0.58 cents each time you play this game, on average.

but the mode is on black.  You're more likely to lose (28/57)(-1) about 0.49 cents on your first time to play

but if you stick it out, and play enough times, you'll average 0.58 cents a game

Which of the following is the best estimate of the area of the irregular shape?

*The answer is not 19.5*

Answers

Answer:

Option (D) 15.5 units²

Step-by-step explanation:

Number of clear squares = 9 = 9 squares

Number of half squares = 7 = 3.5 squares

Number of more than half squares = 1 = 1 squares

Number of less than half squares = 8 = 2 squares

Grand total = 9 + 3.5 + 1 + 2

                    = 15.5 units²

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The width of a rectangle is 4 units less than the length. The area of the rectangle is 12 square units. What is the width, in units, of the rectangle

Answers

The width and length of the rectangle will be -1 units and 3 units, respectively.

What is the area of the rectangle?

Let W be the rectangle's width and L its length.

The area of the rectangle is the multiplication of the two different sides of the rectangle. Then the rectangle's area will be

[tex]\text{Area of the rectangle = L x W square units}[/tex]

The width of a square shape is 4 units less than the length. The region of the square shape is 12 square units. Then the equations are given below.

[tex]W = L - 4[/tex]              ...1

[tex]L \times W = 12[/tex]           ...2

From equations 1 and 2, then we have

[tex]L \times (L - 4) = 12[/tex]

[tex]L^2 - 4L = 12[/tex]

[tex]L^2 - 4L - 12 = 0[/tex]

[tex]L^2 - 3L + 4L - 12 = 0[/tex]

[tex]L(L - 3) + 4(L - 3) = 0[/tex]

[tex](L - 3)(L + 4) = 0[/tex]

[tex]L = 3, -4[/tex]

Then the width of the rectangle is given as,

[tex]W = 3 - 4[/tex]

[tex]W = -1 \ \text{units}[/tex]

The width and length of the rectangular shape will be -1 units and 3 units, separately.

More about the area of the rectangle link is given below.

https://brainly.com/question/20693059

20% OF a IS 15. WHAT IS a

Answers

Answer:

The answer is 3

Step-by-step explanation:

20% of 15 can be written as 20% × 15

= 20/100 × 15

= 3

Thus, 20% of 15 is 3.

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