an inflated round balloon with radius r=50 centimeters hold approximately 523,600 cubic centimeters of air. when the balloon is contracted such that the radius is 2/3 of the original size, what is the approximate volume of the partially deflated balloon?
a. 1.94 * 10 to the 4th power cm cube
b. 1.55 * 10 to the 5th power cm cube
c. 1.75 * 10 to the 5th power cm cube
d. 3.49 * 10 to the 5th power cm cube
