Exercise 14

Several applied functions are given below. In each case, find the indicated quantity (including unit) and interpret the value in the context of the application.

The elevation of a ping pong ball relative to the table top (in m) is given by the function $\fe{h}{t}=1.1\abs{\fe{\cos}{\frac{2\pi t}{3}}}$ where $t$ is the amount of time (s) that has passed since the ball went into play. Find and interpret $\frac{\fe{h}{3}-\fe{h}{1.5}}{3-1.5}$.