A Kennel of 750 Square Feet Is to Be Constructed

Multiple Choice

A kennel of 750 square feet is to be constructed as shown. The cost is $9 per running foot for the sides and $3 per running foot for the ends and dividers. What are the dimensions of the kennel that will minimize the cost? ​
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A) The dimensions of the kennel that will minimize the cost are 25 feet for ends and dividers and 30 feet for sides.
B) The dimensions of the kennel that will minimize the cost are 23 feet for ends and dividers and 31 feet for sides.
C) The dimensions of the kennel that will minimize the cost are 31 feet for ends and dividers and 23 feet for sides.
D) The dimensions of the kennel that will minimize the cost are 23 feet for ends and dividers and 30 feet for sides.
E) The dimensions of the kennel that will minimize the cost are 30 feet for ends and dividers and 25 feet for sides.