### Home > APCALC > Chapter 7 > Lesson 7.3.3 > Problem 7-134

7-134.

Regina’s position along a straight wooden bridge is given by , where

*is measured in feet and*

*is measured in seconds. At*

*she passes her friend Angela who is going the other way, and then at*

*she stops to gaze at the water below.*

Calculate Regina’s average velocity over the interval

. At what time in this interval was Regina traveling at her average velocity?

This is an application of the Mean Value Theorem, which guarantees that, on a closed interval, IROC

AROC somewhere if the function is continuous and differentiable.