A15 oz can of peaches costs $1.99 and a 24 oz can of peaches cost $2.55. how much is the price per ounce of the 15 oz can of peaches

Having a hard time understanding this question (see attachment).

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.

Erik buys 2.5 pounds of cashews. if each pound of cashews costs $7.70, how much will he pay for the cashews?