The population of old town is currently 275,000 and is declining at an annual rate of 1%. The population of new town is 150,000 and is increasing at an annual rate of 2%. If the rates of decrease and increase remain constant, after how many years will the population of the two towns be about equal? The answer is 20 but I need help on finding how to get 20. 

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.

11 mintues is the naswer