If s = {1, 2, 3} and s' = {4,5}, what is the universal set?

Evaluate 4 a for a = 5 2/3 . express your answer in simplest form.

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?