Baylee wants to make 5 cups of juice that contains 70% apple juice and 30% grape juice. She can get bottles of pure apple juice and bottles of a blend that are 50% apple juice and 50% grape juice. What equation models the total volume of juice

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.