The director of Washington County Animal Services wants
to learn more about the adoptable pets in local animal
shelters.
Which of these methods will produce the most representative sample of the
population of adoptable pets at shelters in Washington County?
O
A. The director selects adoptable pet ID numbers at random from
each shelter.
O
B. The director evaluates all adoptable rabbits at area shelters.
O
C. The director visits each shelter and evaluates the first 10 cats in
each place.
O
D. The director evaluates every adoptable pet at one selected shelter.

b. 153 students do not participate in sports and seventy-five 12th graders were surveyed

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places

to find the perimeter, you add up all the lengths of the sides. in this case you would have to add up 18+22+40+80 which equals 160.