Evaluate each expression. 10³

Write each fraction in lowest terms. 8/16

Let U = {1, 2, 3, 4, 5} and A = {1, 2, 3}. Find A′.

Write each fraction in lowest terms. 4/12

Find {16, 18, 21, 50} ∩ {15, 16, 17, 18}.

Evaluate each expression. |-4|