Susan found a bag of 20 golf balls at a garage sale, and bought the bag for $2.00. Express the ratio of cost to number of balls in lowest terms. Use the colon to write the ratio.

The triangles are similar. what is the value of x? 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).

Combine the information in the problem and the chart using the average balance method to solve the problem.