A Rectangular Box with an Open Top Has a Length $C = 2.10 x z + 1.50 ( x y + y z )$

question 19

Multiple Choice

A rectangular box with an open top has a length of x feet, a width of y feet, and a height of z feet. It costs $2.10 per square foot to build the base and $0.75 per square foot to build the Sides. Write the cost C of constructing the box as a function of x, y, and z.

• A) \(C = 2.10 x z + 1.50 ( x y + y z )\)
• B) \(C = 2.10 x z + x y + 2.25 y z\)
• C) \(C = 2.10 x y + 1.50 ( x z + y z )\)
• D) \(C = 2.10 x y + 1.50 x z + 0.75 y z\)
• E) \(C = 2.10 x y + 2.25 ( x z + y z )\)

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