5.1 Exercise 75

Use a calculator to find the answer.

A suspension bridge can be modeled by the quadratic function $h \left(x\right) = .0001 x^{2}$ with $−2000 \leq x \leq 2000$ where $\left|x\right|$ is the number of feet from the center and $h \left(x\right)$ is height in feet. Use the TRACE feature of your calculator to estimate how far from the center does the bridge have a height of 100 feet.