What is the exponential form of 175

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?

Use the graph of the sine function y=2sinθ shown below

How do you find the circumfrance of a circle?