Hans earns 54 dollars per week working part-time at a book store. He makes one dollar more for each book that he sells. The amount, A (in dollars), that Hans earns in a week if he sells b books is given by the following. =A+54b
How much does Hans earn in a week if he sells 25 books?
dollars

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.