crystal wants to build a ramp that will rise 4ft over a horizontal distance of 20ft. how long will the ramp be? round to the nearest tenth.

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  1. Use the Pythagorean Theorem.

    a^2 + b^2 = c^2
    4^2 + 20^2 = c^2
    16 + 400 = c^2
    416 = c^2
    c = sqrt 416
    c = 20.4

    If you draw a picture, you'll end up with a right triangle, and the two shorter sides are a and b, and the hypotenuse (long side) is c.

    Do you get it?

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