If carol has 5 apples and she shares 2/5 of them with her friends how many apples does she have left

She'll have 3 apples left with her, since she shares 2/5 of 5 apples = 2 apples.

She has five apples and when she gives her friends some apples for only has 2 left. That means she shared 3 of them! 

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.