3. A farmer has a plot of land bordering an extremely straight river bank. The farmer wants to construct a rectangular fenced-in enclosure with two compartments that will border the river. The side of the rectangular enclosure bordering the river will require no fence (because the river provides a natural boundary). The other sides will all require fencing, and the two compartments of the enclosure will be formed by a single line segment of fence running perpendicular to the river. (A picture is included below.) If the farmer has a budget to purchase 200 feet of fence, what is the maximum area of such an enclosure that can be formed? obertive function

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