I need a break down of the answer in fraction form

Peaches cost $4.29 per pound. find the cost of two and a quarter pounds of peaches.

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

Satchi found a used bookstore that sells pre-owned dvds and cds. dvds cost $9 each, and cds cost $7 each. satchi can spend no more than $45.