Val rented a bicycle while she was on vacation. she paid a flat retail price be $55 +8.50 each day. the total cost was $123. write an equation you can use to find the number of days she rented the bicycle.

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.