Approximately how many cubic feet of water are needed to fill a circular swimming pool that is 70 feet across and 9 feet deep?	Options:
A) 4000	B) 10000	C) 20000	D) 35000	E) 45000

Rationale: answer should be d . v = \ pir ^ 2 h = \ pi * 35 ^ 2 * 9 = approximately 35000
Answer: D