The mean radius of earth is 6,371.0 kilometers and the mean radius of earth's moon is 1,737.5 kilometers. what is the approximate difference in the mean circumferences, in kilometers, of earth and earth's moon? round your answer to the nearest tenth of a kilometer.

a. 40,030.2
b. 29,113.1
c. 14,556.6
d. 10,917.0

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explanation:

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square