Question

Which of the following expressions represents the volume of a cube that is 2x on an edge?

Answer 1

To find the volume of a cube, you would do side cubed. Because the length of one side is 2x, you would do this, 2x times 2x times 2x, or 2x to the power of 3.

Answer 2

`8x^3` cubic units

Explanation:

It is given that the edge of the cube is 2x.

The volume of a cube is

`V=a^3`

where, a is edge of the cube.

Substitute a=2x in the above formula.

`V=(2x)^3`

`V=(2)^3(x)^3`

`V=8x^3`

Therefore the volume of a cube is
`8x^3` cubic units.