What is the absolute value of -3.85

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?

Acircle has a circumference of 28.36 units what is the diameter of the circle

What is the value of m in the equation 1/2 m - 3/4n=16 when n=8