Question

Approximately how long would it take a radio signal to reach the International Space Station (ISS) at an orbital altitude of 350km?

Answer 1

d = V*T = 3*10^8m/s * T = 3.5*10^5 m.
T = ?.

Answer 2

Speed of radio waves is approximately 300,000km. Divide
350km/300,000km
=0.0011666666666667s