A builder is fencing a rectangular 4000-square-foot storage space. The perimeter of the st...

A builder is fencing a rectangular 4000-square-foot storage space. The perimeter of the storage space is given by , where x is the length of the space.

a. What is the domain of the perimeter function?

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b. Graph the perimeter function on the interval [1.250].

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c. Use the graph to determine the length of side x that gives the smallest perimeter.