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13 February, 07:36

Some Native American tribes made jewelry with Dentalia shells. Each Dentalia shell is about 1.5 inches long. About how much longer would a necklace made with 24 shells be than a necklace made with 18 shells? Use compatible numbers.

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  1. 13 February, 10:14
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    Answer-

    The necklace with 24 shells is longer than the necklace with 18 shells by 9 inches.

    Solution-

    Length of each dentalia shell = 1.5 inches

    Length of the necklace made with 24 shells = 24*1.5 = 36 inches

    Length of the necklace made with 18 shells = 18*1.5 = 27 inches

    The necklace with 24 shells is longer than the necklace with 18 shells by the amount of,

    = 36 - 27 = 9 inches

    ∴ The necklace with 24 shells is longer than the necklace with 18 shells by 9 inches.

    (∵ As the numbers are already rounded off or natural numbers, so we don't have to round them off or use the compatible numbers.)
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