The Management of UNICO Department Store Decides to Enclose an

question 5

Multiple Choice

The management of UNICO Department Store decides to enclose an area outside their building to display potted plants. The enclosed area will be a rectangle, one side of which is provided by the external walls of the store. Two sides of the enclosure will be made of pine board, and the fourth side will be made of galvanized steel fencing material. If the pine board fencing costs $15/running foot and the steel fencing costs $5/running foot, determine the dimensions of the enclosure that will cost the least to erect. Round your answers to two decimal places. ​ ​

• A) 14.31 ft by 84.68 ft
• B) 12.13 ft by 86.86 ft
• C) 14.14 ft by 84.85 ft
• D) 15.68 ft by 83.31 ft

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