10-09-2022
Mathematics

contestada

(30 POINTS) A construction worker is pouring concrete stairs. The first step requires 1.7 cubic feet of concrete, and the first 4 steps require a total of 17 cubic feet. If the steps follow an arithmetic series, how much concrete is required for the first 12 steps?

51 cubic feet
93.5 cubic feet
132.6 cubic feet
244.8 cubic feet

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