document.write( "Question 141755: A ladder 40 ft long leans against a building and reaches a ledge. The foot of the ladder is 16 ft from the building. How high is the ledge? \n" ); document.write( "
Algebra.Com's Answer #103306 by scott8148(6628)\"\" \"About 
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let h=height\r
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\n" ); document.write( "\n" ); document.write( "by Pythagoras __ h^2+16^2=40^2 __ h^2=40^2-16^2 __ h=8sqrt(21)
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