you are planning to clean the sky lights on yur roof. the rof line is 9 feet off the ground and your ladder is 16feet long. the ladder needs to extend 6 feet beyond the roof line in order to let you access the roof safely. how far from the house do you need to place the ladder? round t0 th nearest foot

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16^2 = 15^2 + x^2
256-225 = x^2
x^2 = 31
x = 6 feet

both are wrong. the answer is sqrt(100-81)=sqrt(19) feet

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