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07-12-2017
Mathematics

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Kali has a 20 foot ladder that she wants to use to get her cat out of a tree. She puts the base of the ladder 5 feet away from the base of the tree. How high into the tree will the ladder reach? Round your answer to the nearest tenth of a foot.

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07-12-2017

a^2 + b^2 = c^2
5^2 + b^2 = 20^2
25 + b^2 = 400
b^2 = 375
b = 19.4 feet

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