Laura is putting her dog on a diet. Her dog currently weighs 110
pounds, and she wants to weigh less
than 80 pounds. If she knows her
dog can lose 2.5 pounds per month,
what is the fewest number of months
her dog will have to be on her diet in
order to reach her goal?

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.