Chapter 2, Problem 64RE

(a)

To determine

To graph: The function $y=120x^2-20x^3\text{for}x\ge 0$ by using graphing calculator with the window,

$Y\min =-100,Y\max =700$.

(b)

To determine

The $x$-values for which the model $y=120x^2-20x^3\text{for}x\ge 0$ and $f(x)\ge 0$ is true.