math

posted by sam

A ladder is 2 m long. It leans against a wall so that it is 90 cm from the base of the wall. How far up the wall does the ladder reach? Put your answer in m. Round to 3 sig fig.

  1. Joe

    First get the same units 2 m and .9 m

    wall = x

    x^2 + .9^2 = 2^2
    x^2 + .81 = 4

    solve for x.

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