The Orbital Speed ( S ) of an Earth Satellite

The orbital speed ( s ) of an earth satellite is related to its distance ( r ) from the earth's center by the formula . If the satellite's orbital speed is meters per second, find its altitude a (in meters) above the earth's surface, as shown in the illustration. Round the answer to the nearest meter.

A) 3,173
B) 11,186
C) 10,073,164
D) 10,078,964
E) 10,067,364