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OpenStudy (anonymous):
At a height oh h meters you can see V kilometers to horizon. The number are related by the equation V=3.5√(h). A person can see 392 km to the horizon from an airplane. How high is the airplane.
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OpenStudy (anonymous):
(392/3.5)^2
OpenStudy (anonymous):
392 = 3.5√(h) 392/3.5 = √(h) (112 = √(h))^2 12544 = h
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