A rectangular prism is 40 ft by 38 ft by 15 ft. Shown below is the prism with a half cylinder and smaller rectangular prism removed. 15 ft 38 ft 40 ft T 12 ft 15 ft 10 ft 10 ft Approximately what volume of the original prism remains? O 22,800 ft3 O 19,792 ft3 O 19,560 fts O 17,651 ft3