Andrew had $93. with this money, he could buy 3 cds and 4 books. however, he bought only 2 cds and 3 books and had $27 left. what was th cost of each cd?

Anewborn baby had about 26,000,000,000 cells. an adult has about 4.94 times 10 to the 13 power cells. how many times as many cells does an adult have than a newborn

What term best describes a line ans a point that lie in the same plane

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).