Aspherical water balloon is filled such that it has a diameter of 9 inches. water is then released from the balloon until it has a diameter of 7.2 inches. approximately what volume of water was released from the balloon? a.3 in³ b.186 in³ c.195 in³ d.1489 in³

To find the approximate volume that was released you will find the volume of the sphere before and after the water was released and subtract them.  Use the formula for finding the volume of a sphere to do this.

Before:  

V=4/3 x pi x r^3
    4/3 x 3.14 x 4.5^3
V = 381.51 cubic inches

After:

V=4/3 x pi x r^3
    4/3 x 3.14 x 3.6^3
V = 195.33 cubic inches

381.51 - 195.33 = 186.18 cubic inches

The answer is choice B.