### Home > A2C > Chapter 14 > Lesson 14.9.1.3 > Problem9-37

9-37.

Now we want to calculate the average velocity of our toy car (with $d\left(t\right) = 10t^{2}$). Find the average velocity on each of the intervals.

1. $[4, 5]$

$\frac{\Delta d}{\Delta t} = \frac{d(5) - d(4)}{5 - 4}$

1. $[4, 4.1]$

$\frac{\Delta d}{\Delta t} = \frac{d(4.1) - d(4)}{4.1 - 4}$

1. $[4, 4.01]$

1. $[3.99, 4]$

1. $[3.999, 4]$