Louis is climbing steps to the top of a monument. after climbing 15 steps, louis stops to tie his shoe. if there is a total of 75 steps on the monument, what percent of the total number of steps has louis climbed when he stops to tie his shoe? a. 90% b. 60% c. 20% d. 5%

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.