An engineer wants a satellite to orbit the earth with a period of 72 hours. You may enter answers in scientific notation as shown: 1.23 x 105 = 1.235 At what orbital radius must the satellite orbit? m How far is this location above the earth's surface? At what speed must the satellite travel to maintain the orbit? m/s earth data mass: 5.97 x 1024kg radius: 6.37 x 10°m