# algebra

The volume of a rectangular slab of concrete needs to exceed 72 cu. ft. If the length is 12 feet and the width is 8 feet, how thick does the concrete slab need to be?

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3. 👁 97
1. 12*8*thickness>72

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2. would I replace the word "thickness" with 96? 12*8*96 > 72?

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3. (12 * 8)t = 72
96t = 72
t = 72/96
t = 0.75 inches

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posted by Ms. Sue
4. 9” not .75” its cubic feet not cubic inches.

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posted by Steve

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