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25 August, 13:13

A tree casts a shadow that is 8 feet long, a 3 foot mailbox cast a shadow that is 5 feet long. how tall is the tree?

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  1. 25 August, 13:19
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    Set up two fractions:

    8/x and 3/5

    Set them equal to each other and cross multiply to get:

    8*5 = 3x

    40 = 3x

    13.3 = x or 13 and 1/3 feet tall.
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