Radio signals travel at a rate of 3*10^8 meters per second. How many seconds will it take for a radio signal to travel from a satellite to the surface of the Earth if the satellite is orbiting at a height of 7.5*10^6 meters?
A) 6 seconds
B) 2.5*10^-2 seconds
3) 4.0*10^3 seconds
D) 2.5*10^2 seconds

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