### Home > APCALC > Chapter 7 > Lesson 7.1.4 > Problem 7-38

7-38.

Let be the surface area of an inflatable cube with sides of length

*at time*

*. Write an equation that relates*

Implicitly differentiate with respect to time, .

7-38.

Let be the surface area of an inflatable cube with sides of length

Implicitly differentiate with respect to time, .