The length of a rectangle is increasing at a rate of 5 meters per hour and the width is decreasing at a rate of 1 meter per hour. When the length is 11 meters and the width is 20 meters, then how fast is the AREA changing? The rate of change of AREA is square meters per hour.

A glacier advanced down a mountain from an elevation of 3000 m to 2000 m in 5 years. What was the glaciers rate of change in a year and a month?

The base of a triangle increases at a rate of 3 cm per minute while the height of the triangle decreases at a rate of 2 cm per minute. At what rate is the area of the triangle changing with respect to time when the height is 10 cm and the base is 15 cm? Be sure to write units for your answer.