An 18-foot ladder is leaning against a wall. If the base of the ladder is 6 feet from the wall, how high up on the wall will the ladder reach? Round your answer to the nearest whole foot.
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18^2-6^2= x^2
x^2=324-36
x^2=288
x= 16.9 feet
x^2=324-36
x^2=288
x= 16.9 feet
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