math

The mean radius of the Earth is 6.37 x 106 meters (m). Assuming the earth can be modeled as a perfect sphere
a. In cubic meters (m3 ) what is the volume of the Earth?
b. In meters (m) what is Earth’s circumference?
c. If the mean density is 5.515g/cm3, what is the Earth’s mass in kilograms (kg)?

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