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A ladder 14.3 ft. long leans against a vertical wall. If the top slides down at 2.15ft per second. How fast is the angle of elevation of the ladder decreasing, when the lower end  of is 11.5 ft. from the wall?

A ladder 14.3 ft. long leans against a vertical wall. If the top slides down at 2.15ft per second. How fast is the angle of elevation of the ladder decreasing, when the lower end  of is 11.5 ft. from the wall?

Elementary Geometry For College Students, 7e
Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter5: Similar Triangles
Section5.4: The Pythagorean Theorem
Problem 15E: A guy wire 25 ft long supports an antenna at a point that is 20 ft above the base of the antenna....
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A ladder 14.3 ft. long leans against a vertical wall. If the top slides down at 2.15ft per second. How fast is the angle of elevation of the ladder decreasing, when the lower end 
of is 11.5 ft. from the wall? 

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