22: 88: 10: 40 is this a true proportion

Evaluate 4 a for a = 5 2/3 . express your answer in simplest form.

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).

Describe a situation that you could represent with the inequality x< 17