Assuming the volume of the Earth is 1.08 x 102 km, surface area of the Earth is 5.10 x 108 km, and circumference of the Earth is 4.00 x 104 km, compute the answer to each of the following questions: a) with the mass of Earth MEarth = 5.972 x 1024 kg, estimate density of the Earth. b) Use the mass of the Moon, M Moon = 7.3477 x 1022 kg, and diameter, DMoon = 3,474 km to compute the density of the Moon. c) Obtain the ratio of the density of the Moon to the density of the Earth.