A space shuttle orbits the earth at about 9 kilometers per second. This speed is equal to how many kilometers per hour?	Answers.
A) 480 B) 2,880 C) 4,800 D) 28,800 E) 32,400

Rationale: "seconds in 1 hours : 60 s in 1 min 60 min in 1 hr 60 * 60 = 3600 sec in 1 hr 9 * 3600 = 32,400 answer : e"
Answer: E