For spring break this year your family decided to visit michigan, but it snows the first weekend you are there. you decide to make a snowman. if the bottom ball is 3 feet across, the middle ball is 2 feet across, and the top is 1 foot across, how much snow is needed to build the whole snowman? round your answer to the nearest cubic foot.
a) 19 cubic feet of snow
b) 31 cubic feet of snow
c) 511 cubic feet of snow
d) 824 cubic feet of snow