Jimmy owns a cube-shaped container that measures 10 inches on each side. He fills this container with water until it is half full. Then he throws ten giant ice cubes that measure 1 inch on each side into the container. In inches cubed, how much of the container is unoccupied by ice or water?
10 * 10 * 10 * 1/3 = 500 cubic inches of water
then add 10 cubic inches of ice = 510 in3 total