Answer:
100 millimeters.
Explanation:
Let x represent each side of box.
We have been given that the volume of the cubic box is
cubic millimeters. We are asked to find the length of each side of the box.
We know that each side of cube has equal measure and volume of a cube is cube of each side.
We can represent this information in an equation as:
![x^3=10^6](https://img.qammunity.org/2020/formulas/mathematics/middle-school/in3g26eqkqea7mywsf3pd3maskxzu0ijke.png)
![x^3=1,000,000](https://img.qammunity.org/2020/formulas/mathematics/middle-school/vx4dz4ipaccvfaxm07m1vwbh7rg4rqw4ak.png)
Upon taking cube root of both sides, we will get:
![\sqrt[3]{x^3} =\sqrt[3]{1,000,000}](https://img.qammunity.org/2020/formulas/mathematics/middle-school/7rrr1074pwlhwui7nf3m2mpimwy186rnhy.png)
![x=100](https://img.qammunity.org/2020/formulas/mathematics/middle-school/62wdz4fht6ft3vlobwlzyf9yvzu9snhij2.png)
Therefore, each side of box is 100 millimeters long.