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A communications satellite is in an orbit that is 3.60 107 m directly above the equator.

A communications satellite is in an orbit that is 3.60 107 m directly above the equator. Consider the moment when the satellite is located midway between Quito, Equador, and Belem, Brazil; two cities almost on the equator that are separated by a distance of 4.20 106 m. Find the time it takes for a telephone call to go by the way of satellite between these cities. Ignore the curvature of the earth.

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