Radio waves travel at the speed of light, approximately 300,000,000 m/s. How much time does it take for a radio message to travel from the Earth to the Moon and back? The average distance from Earth to the Moon is 384,000 km.

Express your answer to three significant figures and include the appropriate units.

Frequency and energy have a direct relationship—

(You didn’t type out the information of the waves, but I will guess we’re judging by the same ones.)

Wave Y transfers about three times the amount of energy as wave Z because energy and frequency have a direct relationship.