Will mark best answer as brainliest! :D How do I solve number 15 and 16? They make no sense. If you don't know what the question is asking, here is an example of the answer for number 13: E. Help!

Asales representative from a local radio station is trying to convince the owner of a small fitness club to advertise on her station. the representative says that if the owner begins advertising on the station today, the club's total number of members will grow exponentially each month. she uses the given expression to model the number of club members, in hundreds, after advertising for t months.