9. Calculate the angle of elevation of the line of sight of a person 27.5 m away from a tree, whose eye is 1.8 m above the ground, and is looking at the top of a 19.4 tree. (draw a diagram and
answer to the nearest degree)

If a =6, what is the value of 2a(3b + 5c)?

What is this equation in point-slope form?

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?