math
posted by kate .
A toy baseball bat comes with 3 plastic balls in a box that is a rectangular solid. The box is just big enough to hold the 3 balls. The radius of the balls is 1.9 in. What is the volume of the air in the box surrounding the balls?

Consider each ball as a sphere enclosed in a cube. Then the volume of air is the difference in volume between the cube and the sphere, multiplied by 3 because there are 3 plastic balls.
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