What is the volume of a cube with a side length of 3 units?

To find the volume of a cube, you use the formula which states that the volume is equal to the side length cubed. In this case, the side length of the cube is 3 units.

Calculating the volume involves raising the side length to the power of three:

Volume = side length × side length × side length

Volume = 3 × 3 × 3

This calculation simplifies to:

3 × 3 = 9

Then, multiplying that result by 3 gives you:

9 × 3 = 27

Therefore, the volume of the cube with a side length of 3 units is 27 cubic units. This confirms that the correct choice is indeed 27 cubic units, as it represents the total space occupied by the cube based on its dimensions. Other options do not correctly reflect the volume derived from the formula for a cube.