Have you ever wondered how stringed instruments produce sounds? In this chapter's first activity, you will construct and play a simple stringed instrument. You will make measurements that can be applied to a real instrument. Your final project will consist of drawings that show how to play notes on both instruments.

In this chapter you will learn: how to find and use ratios and unit rates how to write and solve proportions how to find and use percents how to solve a problem by making a table