You want to purchase concert tickets that cost $80. so far you have saved $17 and you plan to save an additional $7 a week. how many weeks will it take you to save enough money to attend the concert?

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.