15, Heading An airplane is headed N 30.0° E and is traveling at 200 miles per hour through the air. The air currents are moving at a constant 30 miles per hour in the direction N 60.0° W. Find the true course of the plane. (That is, find its speed with respect to the ground in miles per hour and its direction with respect to the ground.) Use three significant digits.

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A: Let's find. 

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Q: 580 13

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