The area of a square sandbox is 66 square feet. to the nearest foot, what is the perimeter of the sandbox>

A = a^2...where a is the length of each side
A = 66

66 = a^2
sqrt 66 = a
8.124 = a 

P = 4a
P = 4(8.124)
P = 32.496...rounds to 32 <===so the perimeter, when rounded to the nearest foot is 32 ft

In all honesty, there really is no “work” per say to show. mainly it’s just using the process of elimination. the question is asking which domain(s) would be the most appropriate for the function c(n). n is the number of observed vehicles so right away, 1, 2, and 3 can be eliminated.why? 1, 2 start in the negatives and therefore it is impossible to observe negative cars. so, #4 would be the best answer to the given problem.