Vitems/14921 A band shell used for outdoor performances is shaped like of a sphere. The stage is a semicircle with a radius of 25 feet . To improve the sound, the interior of the shell will be covered with special tiles that cost $ 8 per square foot. How much will it cost to purchase enough tiles to cover the shell, not including the stage? 25 ft Choose the sentence that describes how the quantities in the problem are related. The cost of the tiles is the volume of the shell times the cost per square foot of the tiles. CHECK The cost of the tiles is the area of the semicircle times the cost per square foot of the tiles.​