Use the information below to solve Exercises 81 and 82.

Chapter 5, Problem 81

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Use the information below to solve Exercises 81 and 82. The surface area of a rectangular box is given by the polynomial functionSA = 2HL + 2LW + 2HWand is measured in square units. In business, surface area is often calculated to help determine cost of materials.A rectangular box is to be constructed to hold a new camcorder.The box is to have dimensions 5 inches by 4 inches by9 inches. Find the surface area of the box.

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