Question: A fence must be built to enclose a rectangular area of 20,000 square feet. Fencing material costs $4.00 per foot for the two sides facing

A fence must be built to enclose a rectangular area of 20,000 square feet. Fencing material costs $4.00 per foot for the two sides facing north and south and $8.00 per foot for the other two sides. Find the cost of the least expensive fence. You must show your work.

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