The international space station (ISS) orbits Earth at an altitude of
4.08 x 10^5 m above the surface of the planet. At what velocity must the ISS be moving in order to stay in its orbit?
A) 7.66 x 10^3 m/s
B) 3.12 x 10^4 m/s
C) 7.91 x 10^3 m/s
D) 8.17 x 10^3 m/s
I don’t understand this at all 😭