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balu736 [363]
2 years ago
12

An animal rescue group tracks how their marketing impacts the pet adoptions that occur each year. A record of adoptions for a 12

-month period is shown below, in which the adoption status is sorted according to social media use for those cases.
Featured on Social Media Not Featured on Social Media Total
Animal adopted 138 76 214
Animal not adopted 78 62 140
Total 216 138 354


Which of the following gives the best evidence of association between social media use and adoption of an animal?
A. A greater proportion of animals were adopted when social media was used one hundred thirty-eight over two hundred sixteen than when social media was not used seventy-six over one hundred thirty-eight.
B. The combination of being featured on social media and an animal being adopted occurred more frequently than any other combination.
C. A total of 138 animals were adopted when social media was used, and only 76 were not adopted when social media was used.
D. A total of 216 animals were adopted when featured on social media and 138 animals were not.
Mathematics
1 answer:
jenyasd209 [6]2 years ago
8 0

Answer:

Step-by-step explanation:

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Given the function f(x) = 4(2)x, Section A is from x = 1 to x = 2 and Section B is from x = 3 to x = 4.
Dmitry [639]

Answer:

Step-by-step explanation:

I'm sure you want your functions to appear as perfectly formed as possible so that others can help you.  f(x) = 4(2)x should be written with the " ^ " sign to denote exponentation:  f(x) = 4(2)^x

                                                                                      f(b) - f(a)

The formula for "average rate of change" is a.r.c. = --------------

                                                                                           b - a

                                    change in function value

This is equivalent to  ---------------------------------------

                                            change in x value

For Section A:  x changes from 1 to 2 and the function changes from 4(2)^1 to  4(2)^2:  8 to 16.  Thus, "change in function value" is 8 for a 1-unit change in x from 1 to 2.  Thus, in this Section, the a.r.c. is:

                 8

               ------ = 8 units    (Section A)

                  1

Section B:  x changes from 3 to 4, a net change of 1 unit:  f(x) changes from

4(2)^3 to 4(2)^4, or 32 to 256, a net change of 224 units.  Thus, the a.r.c. is

        224 units

      ----------------- = 224 units (Section B)

            1 unit

The a.r.c for Section B is 28 times greater than the a.r.c. for Section A.

This change in outcome is so great because the function f(x) is an exponential function; as x increases in unit steps, the function increases much faster (we say "exponentially").

7 0
3 years ago
Whats 14 4/10 - 13 1/3 ASAP
monitta

Answer:

1 1/15

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Hi if u could help me that would be great, have a nice day!!!
LenaWriter [7]

Hey there! I'm happy to help!

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

<u>OVERVIEW</u>

Random sampling is when you take a sample of something completely at random. This is done to avoid bias and other stuff like that. It makes the data a lot more pure, real, and factual.

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

<u>CHOOSING THE ANSWER</u>

OPTION A: A SCHOOL NEWSPAPER ASKS TEACHERS IN THAT MIDDLE SCHOOL HOW THEY FEEL ABOUT THE BEHAVIOR OF TWELVE YEAR OLD BOYS.

Does this seem very random to you? They're asking all the teachers who work at a certain junior high to talk about twelve year old boys. But, the teachers are definitely going to have some sort of bias towards twelve year old boys because they work with them, and since all of the samples are teachers, this is going to have biased data. Therefore, answer A is incorrect.

OPTION B: A NATIONAL SURVEY COMPANY PICKS ONE PHONE NUMBER FROM EACH AREA CODE IN AMERICA TO CALL AND ASK FOR AN OPINION ON CURRENT POLITICAL ISSUES.

This definitely seems a lot more random. There is only one phone number from each area code and there are many area codes in the United States so you get a bit of what everyone thinks about an issue. There is no bias because there is one random phone number and there are many different places this is done. Therefore, option B is correct.

OPTION C: MIGRANT WORKERS ARE SURVEYED ON THEIR OPINION OF MANDATORY HEALTH INSURANCE FOR COMPANIES.

This is not very random because they are asking a specific group of workers about a company and business ordeal. It is not very random because the migrant workers are specifically being asked, not random people. Therefore, option C is incorrect.

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

<u>THE SOLUTION</u>

Therefore, Option B is the correct answer.

I hope that this helps! Have a wonderful day!

7 0
3 years ago
The media center at josh's school has a computer area. The first 4 rows have 6 computers each. The fifth row has 4 computers. Ho
Vilka [71]

Answer: 28 computers  


Step-by-step explanation: First you would do 4 times 6, then add that to 4. 4 times 6 = 24+4=28


8 0
2 years ago
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Which of the following transformations preserves congruence?
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The answer is "I" or "I and II".
5 0
2 years ago
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