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28 May, 02:24

A 25 foot ladder rests against a buliding. The base lf the ladder is 15 feet away from the base of the building. At what height does the ladder rest on the building (geometry, pythagorean theorem)

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  1. 28 May, 02:30
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    X^2+15^2=25^2

    X^2+225=625

    Isolate X

    X^2=400

    Take the square root on both sides

    X=positive and negative 20 but in this case the negative is thrown out because you can't have a negative side

    Answer: 20
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