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April 20, 2014

Homework Help: calculus

Posted by robert on Thursday, November 17, 2011 at 11:02pm.

a fence 8 ft tall stands on level ground and runs parallel to a tall building. if the fence is 1 ft from the building, find the length of the shortest ladder that will extend from the ground over the fence to the wall of the building. (hint #1: if L represents the length of the ladder, the quantity L is minimized when the quantity L2 is minimized, so you do not have to concern yourself with thte square root-just minimize L2 and that will minimize L. Hint#2: use similar triangles)
L/ |
/|8|
/_|_|
..|1|

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