The moon's diameter is close to 1/4 of Earth's diameter. Which percentage represents 1/4 ?

For what values of x is x2 + 2x = 24 true?

Louise measured the perimeter of her rectangular scrapbook to be 154 cm. if the scrapbook is 45 cm wide, how long is the scrapbook?

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).