HELP PLZZ MAJOR GRADE HELP PLZZZ

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

25 ! the line of best fit is h = 5a + 86. predict the height at age 16. show your work.

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).