### Home > PC > Chapter 2 > Lesson 2.3.5 > Problem2-128

2-128.
1. A car travels 60 − 10t miles per hour for 0 ≤ t ≤ 3 hours. Homework Help ✎

1. Draw a graph of the situation. Label the axes appropriately.

2. Compute the exact area under the curve.

3. Explain why it is reasonable to say that the car traveled 135 miles in those three hours.

Break the shape into a rectangle and a triangle and sum the two areas. Or, use the formula for the area of a trapezoid.

It is the units on the x and y axis. Area is length times width.

$\frac{\text{miles}}{\text{hour}}\cdot \text{hours}$