. In the 1940s, engineers accurately determined the distance from the Earth to the Moon using radar.If the time from which a signal was sent out from their radar to

the time at which it was received back was 2.56s, what is the distance from the Earth to the Moon? (The speed of radar waves is 3 x10° m/s). A. 769,000 km В. 249,000 km C. 384,000 km D. 336,000 km E. 498,000 km