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A general contractor is constructing a building that requires a concrete foundation that is to be 21 feet by 8 feet by 4 inches thick. If the local home supply store sells concrete for $96 per cubic yard, how many dollars will it cost for the concrete for the foundation.



Answer :

Let's convert everything to feet, first.

The foundation is 21x8x1/3.
Concrete is $32/cubic foot.

21x8x1/3=56 cubic feet of concrete. At $32 per cubic foot, 56x32=$1792.

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