Earth is approximately a sphere of radius 6.37 × 106 m. What are (a) its circumference, (b) its surface area, and (c) its volume?

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A: 1 3.0×102×2.3×107=300×23000000=6900000000=6.9×109

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Q: A plot of land has an area of 12.0 acres, if 1 acre is 4047 m², and a hectare has the same area as a…

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Q: The density of the Earth can be expressed by the equation density = C{1.22 -(r/R)}, where R is the…

A: The mass can be represented as, M=∫0RρdV=∫0RC1.22-rR4πr2drM=4πC∫0R1.22r2-r3RdrM=4πC1.22r33-1Rr440R