PrettPlease pls I beg of you sor

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?

Find the missing dimension! need asap! tiny square is a =3025 in ²

Which word in the sentence below is an interrogative pronoun? who is picking us up from school? whousisfrom