Question

A circle is growing, its radius increasing by 5 mm per second. Find the rate at which the area is changing at the moment when the radius is 28 mm. When the radius is 28 mm, the area is changing at approximately ......(Round to the nearest thousandth as needed.)

Answer 1

So, when the radius is 28 mm, the area is changing at a rate of approximately 879.646 square millimeters per second. Rounded to the nearest thousandth, this is approximately 879.646 mm²/s.

Explanation: