Which of the following questions can be answered by numbers

Simplify the expression. enter the correct answer.

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

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?