If the national economy shrank at an annual rate of 10% per year for four consecutive years, then the economy shrank by 40% over the four-year period

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?

Aof 12 , we to a of 4 to on a .of 4 be ?

Find the measure of the angle indicated in bold