### Home > PC > Chapter 9 > Lesson 9.3.5 > Problem 9-155

9-155.

A small cart travels a distance of 0.1

*t*^{3}feet in the first*t*seconds of travel for 0 ≤*t ≤*10. Homework Help ✎Find its velocity after 5 seconds.

Find its velocity after

*t*seconds.

First find the slope function.

Then find *d′*(5).

This is the slope function found above.