This is urgent, please answer!

The diagram shows the dimensions of a pool cover for a hotel pool.

Write and solve and equation to find the area of the pool cover.

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 exact value of each of the following. in each case, show your work and explain the steps you take to find the value. (a) sin 17π/6 (b) tan 13π/4 (c) sec 11π/3

According to the data set, where should the upper quartile line of the box plot be placed?