A rock is thrown into a still pond. The circular ripples move outward from the point of impact of the rock so that the radius of the circle formed by a ripple increases at the rate of 2 feet per minute. Find the rate at which the area is changing at the instant the radius is 5 feet.

When the radius is 5 feet, the area is changing at approximately _____ square feet per minute.(Round to the nearest thousandth as needed.)