13. How many times larger than 5.5 x 10-4 is 1.1 x 10-1?

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 statement is true? 2x^2-9x+2=-1

Which expression is equivalent to 3^3 + 2^2?