?

AP® Calculus AB-BC

Free Version

Upgrade subject to access all content

Easy

Maximum Rain Falling

APCALC-3EBMLH

If the rate of rain in inches per hour falling during a storm is given by the function $R( t ) =-( t-3 ) ( t-6 ) -2$ where $t=0$ represents the start of the storm, at what time, $t$, will the most amount of rainfall?

A

$20$

B

$5$

C

$4.5$

D

$4$