Isabel has scored 22, 20, and 20 points in her three basketball games so far. How many points does she need to score in her next game so that her average is 20 points per game?

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.