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.

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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