### Home > APCALC > Chapter 7 > Lesson 7.1.4 > Problem 7-37

7-37.

be the area of a circle with radius

*at time*

*. Write an equation that relates*

*.*

**Homework Help ✎**

*A* =* πr*^{2}

Implicitly differentiate both sides of the area function WITH RESPECT TO TIME, *t*.