What are all the factors and multiples of 13

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).

If 3 3/4 lb. of candy costs 20.25 how much would 1lb. of candy cost

Rewrite the expression in z to the n power. the expression i was given is: 1 over z to the negative 1 half power.