A geology teacher takes her class on an annual field trip to analyze rock samples. They use randomized sets of
coordinates to select samples from two regions.
Suppose they examine a sample of 70 rocks from region A, which is composed of 15% igneous rock. Then they
examine a sample of 60 rocks from region B, which is composed of 20% igneous rock. Then they look at the
difference between the sample proportions (PA - B).
What are the mean and standard deviation of the sampling distribution of pA - PB?

Answers

Answer 1
Second option would be the answer

Related Questions

help me u get brainliest plus more points :D

Answers

Answer:

6 is 56.25

7 is 97.50

Step-by-step explanation:

recipe calls for 1/3 of a cup of milk for 10 cookies how many cups of milk are needed to make 90 cookies

Answers

Answer:

just multiply by 9 :)

Step-by-step explanation:

What is the area of this figure? I give brainliest and thanks :)

Answers

Answer:

591 square cm

Step-by-step explanation:

25 times 23 =575

4 times 4 =16

575 plus 16=591

Answer:

591

Step-by-step explanation:

23x25=575+(4x4)=591

A) 9)___ + 7) = 18 + 63 B) ___(12 + 9) + 36 + 27 C) 8(___+7) = 24 + 56 D) ___(5 + 8) + 20 +32

Answers

Answer:

A) 9(2+7)

B) 3(12+9

C) 8(3+7)

D)4(5+8)

Step-by-step explanation:

A)

9*(x+7) = 18+63

9*(x+7) = 81

81/9 = x+7

9 = x+7

x = 2

B)

x*(12+9) = 36+27

x*(12+9) = 63

x*21 = 63

x = 63/21

x = 3

C)

8*(x+7) = 24+56

8*(x+7) = 80

x+7 = 80/8

x+7 = 10

x = 3

D)

x*(5+8) = 20+32

x*13 = 52

x = 52/13

x = 4

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

HELP. What is the value of y in the equation 2(2y - 12) = 0? (5 points)
1) 4
12 6
3
3) 7
4) 8

Answers

Answer:

6

Step-by-step explanation:

2(2y - 12) = 0

distribute the 2

2·2y - 2·12 = 0

4y - 24 = 0

add 24 to both sides

4y - 24 + 24 = 0 + 24

4y = 24

divide both sides by 4

(4y)/4 = 24/4

y = 6

Huh?! Its me DaBaby less gooo i need your help with this question. Yeah Yeah!

Answers

Answer:

Omg  im a big fan anything for you the answer is d

Step-by-step explanation:

Answer:

D

Step-by-step explanation:

.

A van is rented for a family vacation. The van rental is $75.00 per day, plus a $160.00 insurance fee. Which equation could be used to find x, the number of days the car be rented if they want to spend exactly $760.00 on the van rental.

A. 75.00 + 160.00x = 760.00
B. 75.00x – 160.00 = 760.00
C. 75.00 – 160.00x = 760.00
D. 75.00x + 160.00 = 760.00

Answers

8 days—> because if you 160 insurance is already added, subtract that to get your original price since that’s what is actually being counted.
So I did 760-160=600
600/75=8
Also your answer is D.

2. If GFE~GJH, find the value of FG.

Answers

Answer:

77 units

Step-by-step explanation:

Given two similar triangles.

Corresponding parts of similar figures have same ratio.

Use ratios to find the value of x:

(4x - 5)/(x + 7) = 35/12.5(4x - 5)/(x + 7) = 14/55(4x - 5) = 14(x + 7)20x - 25 = 14x + 9820x - 14x = 98 + 256x = 123x = 123/6x = 20.5

Find the value of FG:

FG = 4*20.5 - 5 = 77

anyone know the answer

Answers

Answer:

I DONT KNOW SOORY

Step-by-step explanation:

jbjnmbgkuyhjn

FAVORITE HAIKYUU SHIP GO!!

Answers

Answer:

Kageyama x Milk

Step-by-step explanation:

djkdkdkdksksk y u h

I don’t know what that is

you have a coupon for $4 off the price of any large pizza . you also get a 20% discount on any pizza if you show your student ID. How much would you pay for a large pizza if the cashier applies the coupon first?

Answers

Answer:

You would pay 80% of the cost of a large pizza. So if the pizza was $10 you would pay $8 getting $2 off.

Step-by-step explanation:

Factor each completely.

2x3 - 9x2 + 9x

Answers

Answer:

x(2x−3)(x−3)

Step-by-step explanation:

2x^3−9x^2+9x

= x(2x−3)(x−3)

Find the distance between the pair of points.
(-4,3) and (-8,3)
The distance between the pair of points is
units.

Answers

Answer:

4 units

Step-by-step explanation:

Use the distance formula

d = [tex]\sqrt{(x2 - x1)^2 + (y2 - y1)^2}[/tex]

Plug in the points

d = [tex]\sqrt{(-4 - (-8))^2 + (3 - 3)^2}[/tex]

d = [tex]\sqrt{(4)^2 + (0)^2}[/tex]

d = [tex]\sqrt{16}[/tex]

d = 4

So, the distance between the pair of points is 4 units

Answer:

4 units

Step-by-step explanation:

[tex]\large{ \sqrt{ {(x_2 - x_1)}^{2} + {(y_2 - y_1)}^{2} } }[/tex]

The formula above is the formula of distance between two points.

Substitute the ordered pairs in.

[tex] \large{ \sqrt{ {( - 4 + 8)}^{2} + {(3 - 3)}^{2} } } \\ \large{ \sqrt{ {4}^{2} + 0 } } = \sqrt{16} = 4[/tex]

Therefore, the distance between two points is 4 units.

What is -1/4-(-3/5).

Answers

Answer:Okay that was easy its 0.35

Step-by-step explanation:

0.35 hope this helps!

Write this decimal in numbers.
seventy-eight and thirty-six hundredths

Answers

Answer:

78.36

Step-by-step explanation: The hundredths place is the second number to the right from the decimal. In this case seventy-eight would be 78, and thirty-six hundredths would be the rest of the numbers. 78.36. The "and" also gives you a hint of where the decimal would be.

If a snowball melts so that its surface area decreases at a rate of 3 cm2/min, find the rate (in cm/min) at which the diameter decreases when the diameter is 9 cm. (Round your answer to three decimal places.)

Answers

Answer:

The diameter decreases at a rate of 0.053 cm/min.

Step-by-step explanation:

Surface area of an snowball

The surface area of an snowball has the following equation:

[tex]S_{a} = \pi d^2[/tex]

In which d is the diameter.

Implicit differentiation:

To solve this question, we differentiate the equation for the surface area implictly, in function of t. So

[tex]\frac{dS_{a}}{dt} = 2d\pi\frac{dd}{dt}[/tex]

Surface area decreases at a rate of 3 cm2/min

This means that [tex]\frac{dS_{a}}{dt} = -3[/tex]

Tind the rate (in cm/min) at which the diameter decreases when the diameter is 9 cm.

This is [tex]\frac{dd}{dt}[/tex] when [tex]d = 9[/tex]. So

[tex]\frac{dS_{a}}{dt} = 2d\pi\frac{dd}{dt}[/tex]

[tex]-3 = 2*9\pi\frac{dd}{dt}[/tex]

[tex]\frac{dd}{dt} = -\frac{3}{18\pi}[/tex]

[tex]\frac{dd}{dt} = -0.053[/tex]

The diameter decreases at a rate of 0.053 cm/min.

sec (x) = -2.3. If x and y are complementary, what is csc (y)?

Answers

Answer:

eat my cog

Step-by-step

(q12) Find the volume of the solid obtained by rotating the region under the curve
over the interval [4, 7] that will be rotated about the x-axis.

Answers

The volume of the solid obtained by rotating the region under the curve over the interval [4, 7] about the x-axis is approximately 111.817 cubic units.

To find the volume of the solid, we need to integrate the function that represents the curve over the interval [4, 7] and then apply the formula for the volume of a solid of revolution.

Let's assume the function that represents the curve is f(x). We want to rotate the region under the curve from x = 4 to x = 7 about the x-axis.

The formula for the volume of a solid of revolution is given by:

[tex]V = \pi \int\limits^a_b { (f(x))^2} \, dx[/tex]

In this case, a = 4 and b = 7, so the formula becomes:

The volume of the solid obtained by rotating the region under the curve over the interval [4, 7] about the x-axis is approximately 111.817 cubic units.

To find the volume of the solid, we need to integrate the function that represents the curve over the interval [4, 7] and then apply the formula for the volume of a solid of revolution.

Let's assume the function that represents the curve is f(x). We want to rotate the region under the curve from x = 4 to x = 7 about the x-axis.

The formula for the volume of a solid of revolution is given by:

[tex]V = \pi \int\limits^a_b { (f(x))^2} \, dx[/tex]

In this case, a = 4 and b = 7, so the formula becomes:

[tex]V = \pi \int\limits^4_7 { (f(x))^2} \, dx[/tex]

To calculate the integral, we need to know the specific function f(x). Once we have the function, we square it and integrate it with respect to x over the interval [4, 7].

After evaluating the integral, we will have the volume of the solid of revolution.

Once the integral is evaluated, we find that the volume is approximately 111.817 cubic units.

For more such questions on volume , click on:

https://brainly.com/question/27535498

#SPJ8

First you will examine how reflections affect the orientation and location of quaunder
Part A
Predict what will happen to the coordinates of a point (x, y) as the point reflects across a line to produce point (x,y). Choose the x-axis, y-axis, y = x
and y = -x for the lines of reflection. Express your answers in terms of x and y. (Be sure to watch your signs.)
B T U x X Font Sizes AA- :
E 2
Line of reflection Xy
X-axis
y-axis
-X
7:11 PM
4/19/2021
O
994
Type here to search

Answers

Answer:

x -y

-x y

y x

-y -x

Step-by-step explanation:

that's its

HELP PLSSSS
8^2 b - 3 when b = 3

Answers

Answer:

0

Step-by-step explanation:

If b is 3 then the quiz can be rewritten as

8²3-3

8²0

64×0=0

Well it's just a trial

30 POINT FOR BRAINLIEST ANSWER!!!!!​

Answers

Answer:

[tex]H)39.6[/tex]

Step-by-step explanation:

To get the mean, you have to add all the numbers, then divide the sum by the amount of individual numbers there are.

In this problem, we see that there are 5 different numbers. If we add all those numbers together, they will equal 198.

[tex]198[/tex] ÷ [tex]5 = 39.6[/tex]

PLS, HELP DO NOT TRIY THE FAKE I CANT UPLOAD STUFF I KNOW ITS A VIREIS.
The height of the water in a tank decreases by 3.5 cm each day. When the tank is full, the water is 10 m deep. The water tank needs to be refilled when the water height drops below 4 m.



Write a question that could be answered by solving the equation 10−0.035d=4.

Answers

Answer:

How many days will it take for the water to be 4m high?

Step-by-step explanation:

use the missing variable.

Simplify 15 – 3(6 – 4)

Answers

Answer:

9

Step-by-step explanation:

15-3(6 -4)

=15-3(2)

=15-6

=9

Therefore 9 is the answer

Answer:

9

Step-by-step explanation:

Which representation shows a proportional relationship between x and y?

Answers

Answer:

is taht delta math

Step-by-step explanation:

of so than we r in this togethrr LOL

Karin has 7 more pieces of candy than Danny. Danny has d pieces of candy. Karin uses the expression 7 + d to figure out how many pieces of candy she has.


How many pieces of candy does Karin have if d = 4?


A. 2

B. 28

C. 3

D. 11

Answers

Answer:B

Step-by-step explanation:

If d=4 and Danny has 7 more peices all you have to do is multiply. 7x4 and that equals 28

So the final answer is 28 which is choice B

ANSWER ASAP! ALL SCAM LINKS WILL BE REPORTED.

Answers

Answer:

y=55+15x

Step-by-step explanation:

Answer:

The answer is (C) y = 55 + 15 x

Step-by-step explanation:

This is because the cost of the plan must be added to the cost of the lines to find the total cost. The equation for option (C) correctly depicts that y the plan, needs to be added to x the lines. This equation correctly shows the relationship between the two numbers.

Order the angle measures from least to greatest

please help

Answers

Answer:

Least = m<H

Middle = m<J

Greatest = m<I

Step-by-step explanation:

The angle opposite the shortest side would have the shortest angle.  The side opposite the greatest side would have the greatest angle.

Least = m<H

Middle = m<J

Greatest = m<I

3. What is the probability that when a fair coin is flipped 20 times, there will be exactly five tails?​

Answers

Answer: Probability of getting  

17

tails from  

20

tosses is  

285

262144

=

0.0010872

Step-by-step explanation:

When a coin is tossed there are two possibilities.- it is either a head or tail and probability of getting either head or tail is  

1

2

.

The following is a data set of five quiz scores.



92, 88, 90, 96, 84



What is the mean absolute deviation of the scores?

Answers

Answer:

The mean absolute deviation is 36.8. Hope this was helpful

Step-by-step explanation:

can someone help me answer these two questions i will give you brainliest

Answers

1) supplementary
2) vertical
Other Questions
and Elise buy five-year-old used Toyota from a dealership for $15499. They put down 5% down and finance the rest with the dealership at 7.9% add on interest. They agree to 60 monthly payments. 3 a. Find the size of each payment 77445=14724.05 >>FV=PLI+/+) manhis = 5yrs 1472/05 (1+2 b. Prepare an amortization schedule for the first three months of the loan. Balance Total payment Interest portion Month number Principal portion 1 2 3 _____ research studies several groups of individuals at various ages, at one point in time, and provides information regarding _____.A) Cross-sectional; age differencesB) Cross-sectional; age changesC) Longitudinal; age differencesD) Longitudinal; age changes On July 31, ALOE Inc. received $5,000 cash from a customer who previously purchased ALOE's products on account. What entry should ALOE Inc. record at the time it receives cash?A) Debit Cash, $5,000; credit Service Revenue, $5,000.B) Debit Accounts Receivable, $5,000; credit Cash, $5,000.C) Debit Cash, $5,000; credit Accounts Receivable, $5,000.D) Debit Cash, $5,000; credit Accounts Payable, $5,000. LINEAR DIOPHANTINE EQUATIONS 2) Determine the integral solutions for which x and y are positive. 2x + 5y = 17 d. The NMR spectrum for icosane is shown below. Assume that the molecule is a linear alkane, and use the integrations from the spectrum to determine the structure of icosane.2. Consider the block copolymers that you will be making in this experiment. Which polymer is the amorphous block? Which is the crystalline block? What characteristics of the repeating units give rise to these properties? 3. Think about the initiator, 1,4-benzenedimethanol. How many chains will one initiator molecule make? Where would the initiator fragment be located in the chain? select the types of samples that can be used for serological testingSerum UrineFeces Cerebrospinal fluid Saliva 1) A two-year, $1,000 (i.e., face value) bond that pays an annual coupon of 10 percent and trades at a yield of 8 percent. Calculate Macaulay duration.[Tip: try to draw a timeline with cash flow information.]Group of answer choices0.52341.85452.01.76901.91062) Assume the same information as in the previous question. A two-year, $1,000 (i.e., face value) bond that pays an annual coupon of 10 percent and trades at a yield of 8 percent. Calculate Modified Duration, and Dollar Duration.Group of answer choices1.6380 years; $1,696.371.8889 years; $1,956.251.769 years ; $1,832.081.769 years; $1,769.001.8519 years ; $1,917.893) Assume the same information as in the previous question. A two-year, $1,000 (i.e., face value) bond that pays an annual coupon of 10 percent and trades at a yield of 8 percent. What will be the change in price and the new price using the duration model if interest rates increase to 8.5 percent?Group of answer choicesP = -$9.59 ; P = $990.41P = -$9.59 ; P = $1026.07P = -$9.16 ; P = $1026.50P = -$8.85 ; P = $991.41P = -$9.16 ; P = $990.84 CX Enterprises has the following expected dividends: $1.07 in one year, $1.21 in two years, and $1.29 in three years. After that, its dividends are expected to grow at 3.7% per year forever (so that year 4's dividend will be 3.7% more than $1.29 and so on). If CX's equity cost of capital is 11.7%, what is the current price of its stock? The price of the stock will be $ (Round to the nearest cent.) The lateral area of a cone is 574 pie cm2. The radius is 19.6cm what is the slant height to the nearest tenth of a cenimeter Britney files a lawsuit against Kevin and wants her case settled as quickly and with as little cost as possible. Her best option is:a. appeal.b. litigation.c. mediation.d. arbitration.c. mediation. Blessed wants to get some to start some business after graduating from NIPA. She has registered her business with PACRA and wants to borrow from Muchie Bank.What will Muchie bank look at to see if Blessed will manage to honor her obligations? The price elasticity of demand for a good is relatively elastic if: A. the good is less of a necessity. B. the consumer has more time to make decisions about purchasing the good. C. there are a large The total (after-tax) cost of a laptop computer is $1619.18. The local sales tax rate is 6.4%. What is the retail (pre-tax) price? The retail (pre-tax) price of the computer is $ (Simplify your answer. Round to the nearest cent as needed.) If a business purchases a new fleet of delivery trucks, that business has made an investment in which factor of production? 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What is the total value of the intangible assets in the year ended 30 June 2022. Solve the Loploce equation [0,1]^2. u=0u(0,b)=u (1,y)=0u(x,0)= sin (x), u(x,1)=0 Suppose a stock had an initial price of $76 per share, paid a dividend of $1.95 per share during the year, and had an ending share price of $68. Compute the percentage total return. (A negative answer should be indicated by a minus sign. Enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) What was the dividend yield and the capital gains yield? (A negative answer should be indicated by a minus sign. Enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) if an object is infinitely to the left of a converging lens with focal length f, where is the image located? be specific. Which of the following statements is NOT true of vaccine adjuvants?a. options: Formaldahyde and mercury are used as vaccine adjuvantsb. Antigenic subunits are sometimes used as adjuvants to enhance the response to particular structures on target pathogensc. Adjuvants are added to vaccines to enhance the innate immune response to the antigensd. Environmental exposure to the substances used as adjuvants far exceeds the amount used in vaccines Comment your opinion for this post.The first step to a SWOT (Strength, Weakness, Opportunies, and Threats) analysis is an internal look at the organization for its strengths and weakness at the present time. The second step is to do a broad look at opportunies that maybe are or will be available and the threats that they may face or may face in the future.(Jones 2022)A SWOT analysis determines the strategies used by looking strengths and weaknesses to opportunies and threats as a whole. On a Corperate-level if you have a strong team turning out a great product that people love then expanding the types of product my be the best fit. While at a Business-level strategies might have you lowering your prices by finding cheaper parts. While a Functional-level strategy looks at how to improve inside the organization, finding ways to improve the "factory line" improving output while keeping cost.Michael Porter developed a theory to help gain a competitive advantage in a market or industry. His theory would allow an organization to counter industry forces. Those forces are rivalry, companies that compete with each other. Potential for entry, the easier it is for other organizations to enter. Large suppliers, if there is a limited amount of suppliers they can set the price. Large customers, if the large customer base is small they can bargain down on prices. Substitute products, having alternative products consumers may go to. His business-level plan was that managers need to either differentiate the product by increasing its worth to the consumers or lower the cost of making the brand. 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Diversification strategy which could be related or unrelated. Related not being the same type but sharing facilities or ad campaigns. Unrelated being buying companies that have nothing to do with the current one. There is also an international expansion where managers decide if they can expand out into the rest of the world. Managers have to know the cultures of their potential new consumers, whether its okay to take a global strategy and sell the same as they do in their current market or go with a multidomestic strategy to customize their products and maketing. (Jones 2022)Bombas took a concertation approach to their corperation-level strategy. They brought a strong focus on to their product and expanded their web of partners. While also building a relationship with more organizations to help their cause, to help the homeless.Maid For You Inc. a small housekeeping company in the Pacific Northwest has some great opportunities such as expanding the services offered, to include carpet washing, window washing, and possibly even light food prep. Offering discounts for clients with multiple locations. Expanding their area of service like another county. They face some serious threats including slow business when the economy isn't doing well. The threat of large housekeeping companies in the area that may have lower costs. Going green is a big deal to a lot of people in the Pacfic Northwest. Cleaning products can be really harsh in that field. Going green as much as they can for customers will make them feel good about using Maid For You Inc. Knowing the people cleaning carpooled to save resources, using all natural green products so when the client bathes their young child later they aren't worried about what cleaning chemicals were left behind when their child inevitably drinks the bath water.