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The tree in your friend's yard casts a shadow that is 27 feet long. Your friend is 5 feet tall and casts a shadow that is 4.5 feet long. What is the height of the tree?

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  1. 17 July, 20:48
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    Set the equation up as a proportion, where x = the height of the tree in feet

    27/x = 4.5/5

    cross multiply

    (4.5) (x) = (27) (5)

    (4.5) (x) = 135

    divide the entire equation by 4.5 to isolate x

    135/4.5 = 30

    x = 30

    the tree is 30 ft tall
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