Dimensions of Box 2: x by 4x – 1 by x3The volume of Box 2 is given by:

Multiply the three dimensions: x(4x − 1)(x³). First, x · x³ = x⁴, so the volume is x⁴(4x − 1). Distributing gives 4x⁵ − x⁴, which matches choice A.

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