What is the unit rate for 11.49 for 3 packages

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

At 6 1/2 cents per pound of string beans how much does 7 pounds cost

If you are dealt 4 cards from a shuffled deck of 52? cards, find the probability that all 4 cards are diamondsdiamonds.