Answer:
64 cubic units, where the side lengths are 4 units long
Explanation:
If Elena has 80 unit cubes, the largest cube she can build would be a cube with each side made up of the maximum number of unit cubes. To find this, we need to find the cube root of 80:
![\sqrt[3]{80}](https://img.qammunity.org/2024/formulas/mathematics/high-school/492byd5gqiakv9fo4i3k6uuwoboufgklnp.png)
The cube root of 80 is approximately 4.31. However, since we can't have a fraction of a cube, we would take the integer part, which is 4.
So, the largest cube Elena can build would have each side consisting of 4 unit cubes. The volume of this cube would be:
4 × 4 × 4 = 64 cubic units