Solve. Use 3.14 to approximate π. Round to the nearest whole number.
A spherical balloon is inflated until its diameter is 18 in. Air is then released from the balloon until its diameter is 6 in. Approximately how many cubic inches of air were released from the balloon?
Find the original volume of the balloon.
Voriginal=43πr3
=43π(9)3
=43π(729)
=972π