Sydney's dad helps her invest in the stock market. She gives her dad $12 and asks him to invest it in
bicycles. The next month her dad cashes out her
stocks and gives Sydney $24 back. What
percentage of money did she make?

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.