Farmer Brown wants to fence in a rectangular plot in a large field, using a straight rock wall that is already there as the north boundary. The fencing for the east and west sides of the plot will cost $3 a yard, but she needs to use special fencing, which will minimize the cost of the fencing.
a) find the equation to maximized or minimized.
b) finding the solution.
c)showing that your solution is an absolute maximum or minimum.
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how expensive is the special fencing?
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