# Mathematics - Quadratic Equations

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The volume of a box is the product of its length, width, and height. Find a function f that models the volume of a box if the width of the box is 9 feet and its height is 3 feet more than its length. Find the volume of the box if the length is 21 feet.

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#### Solution Summary

The expert uses the quadratic equation to determine the length, width and height of a product. A complete, neat and step-by-step solution is provided.

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