The volume of Earth is approximately 1 × 10^12 cu km, while the volume of Earth's moon is approximately 2 × 101^0 cu km. Which of the following is true?
a.The volume of Earth is approximately five times the volume of Earth's moon.
b.The volume of Earth is approximately fifty times the volume of Earth's moon.
c.The volume of Earth's moon is approximately five times the volume of Earth.
d.The volume of Earth's moon is approximately fifty times the volume of Earth.