Its just this one question -number 15

Formula of the Volume of this prism = Area of Base × Height of prism
Lets find the area of the base
                        =Base×Height
                        =2×1
                        =×
              (Changing the mixed fraction to an improper fraction is helpful)
                        = ft² = 2 ft²
Volume of the prism: 
              =Area of base × Height of prism
              =2×2
       (Change it to improper fraction again)
              =×
              = ft³ = 7 ft³
The answer is D: 7 cubic feet

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