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28 January, 14:49

an 18 foot leans against a wall. The base of the ladder is 9 feet from the wall on the level ground. How many feet up the wall, to the nearest tenth of a foot, is the top of the ladder

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  1. 28 January, 16:16
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    15.6

    Step-by-step explanation:

    We need to use Pythagorean theorem:

    hypotenuse ² = (leg 1) ² + (leg 2) ²

    Hypotenuse is 18 ft.

    leg 1 = 9 ft.

    18² = 9² + (leg2) ²

    (leg 2) ² = 243

    (leg 2) = + √243 ≈ 15.6 (ft)
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