An Open Box Is to Be Made from a Square $V ( x ) = - 2 x ^ { 3 } + 28 x ^ { 2 }$

question 52

Multiple Choice

An open box is to be made from a square piece of cardboard,28 inches on a side,by cutting equal squares with sides of length x from the corners and turning up the sides (see figure below) .Determine the function,V,in terms of x,that represents the volume of the box.

• A) \(V ( x ) = - 2 x ^ { 3 } + 28 x ^ { 2 }\)
• B) \(V ( x ) = - 4 x ^ { 3 } + 56 x ^ { 2 }\)
• C) \(V ( x ) = 4 x ^ { 3 } - 56 x ^ { 2 } + 28 x\)
• D) \(V ( x ) = - 4 x ^ { 3 } + 56 x ^ { 2 } - 28 x\)
• E) \(V ( x ) = 4 x ^ { 3 } - 112 x ^ { 2 } + 784 x\)

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