The volume of a cube with a side length of 2x^4 is 8x^12 cubic units.  Explanation To find the volume of a cube, you can multiply the length of one side by itself three times. The formula for the volume of a cube is V=s^3, where s is the length of one side.  In this case, the side length is 2x^4, so the volume is: V=8x^12