Question 114345
A NASA satellite makes a circular orbit around a planet of unknown diamter at an altitude of one mile above the planet.
Then NASA boosted the satellite to an altitude one mile higher(an altitude of two miles above planet.) In the second orbit, the satellite travels how many miles farther than it travelled on the first orbit?
(C=2pir) 
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Lower orbit distance = 2(pi)(r+1) where r is the radius of the unknown planet.
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Upper orbit distance = 2(pi)(r+2)
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Difference EQUATION:
2(pi)(r+2)-2(pi)(r+1) = 2(pi)[(r+2)-(r+1)] = 2(pi) miles
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Cheers,
Stan H.