9. A Manufacturer plans to produce a one-compartment vertical file by folding the long side of 10-in by 18-in sheet of plastic along two lines to form a U-shape. (a) Write an quadratic equation that modes the Volume of this U-shaped object (b) How tall should the file be in order to maximize the volume that the file can hold? (c) Find the maximum volume of this.

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Q: b) Plot the quadratic y=-2x² + 8x-8, where 0 ≤ x ≤ 4.

A: y=-2x2+8x-8

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