What is one half equivalent to ?

-- It's equal to 50% .

-- It's equal to EVERY fraction where the denominator
is twice the size of the numerator.  There are an
infinite number of them.

The correct answer is: 2

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.