On a morning of a day when the sun will pass directly overhead, the shadow of a 72-ft building on level ground is 21 ft long. At the moment in question, the angle 0 the sun makes with the ground is increasing at the rate of 0.27/min. At what rate is the shadow decreasing? Remember to use radians in your calculations. Express your answer in inches per minute. The shadow is decreasing at inches per minute (Round to one decimal place as needed.)