The Hubble Space Telescope Orbits at an Altitude of 600

Multiple Choice

The Hubble Space Telescope orbits at an altitude of 600 km above Earth's surface.Assuming it is in a stable circular orbit, what is its velocity? For reference, Earth's radius is 6,400 km and Earth's mass is 6* 10²⁴ kg.

A) 240,000 m/s
B) 7,500 m/s
C) 51,000 m/s
D) 64,000 m/s
E) You also must know the mass of the Hubble Space Telescope to determine its speed.