An airplane is flying at a constant altitude of 4,400 ft. and passes through as point directly above an observer. At the instant when the angle of elevation is 45◦, the angle is decreasing at the rate of 0.05 radian per second. How fast is the airplane flying at this instant?

An airplane is flying at a constant altitude of 4,400 ft. and passes through as point directly above an observer. At the instant when the angle of elevation is 45◦, the angle is decreasing at the rate of 0.05 radian per second. How fast is the airplane flying at this instant?

Algebra: Structure And Method, Book 1

(REV)00th Edition

ISBN:9780395977224

Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Chapter2: Working With Real Numbers

Section2.3: Rules For Addition

Problem 14P

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An airplane is flying at a constant altitude of 4,400 ft. and passes
through as point directly above an observer. At the instant when the
angle of elevation is 45◦, the angle is decreasing at the rate of 0.05
radian per second. How fast is the airplane flying at this instant?

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