Please answer the question

What is (28 + 7 + 6 + 3) x 1/2 show your work

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?

What is the least common factor of 6 and 8