WeBWorK using host: https://webwork-ptx.aimath.org, format: simple seed: 96

Solve by factoring $4t-t^2=0\text{.}$

$t=$ Use a comma to separate solutions.

Solve by factoring $20t-5t^2=0\text{.}$

$t=$ Use a comma to separate solutions.

Graph $y=4t-t^2$ and $y=20t-5t^2$ together in the window

$\begin{aligned} \text{Xmin}\amp = -2\amp \text{Ymin}\amp = -20\\ \text{Xmax}\amp = 6\amp \text{Ymax}\amp = 25 \end{aligned}$

and locate the horizontal intercepts on each graph.

$t=$ Use a comma to separate values.