Answer:
72 mm^3
Explanation:
To find the volume of this irregular figure, first find each of the cubes.
Part I. Finding the bottom cube
Since the volume of a cube is s^3 where s is the side, we can plug 4 in and we get 64 mm^3.
Part II. Finding the top cube
Using the formula for volume of a cube, we get the volume of the upper cube to be 8 mm^3.
Part II. The total volume of the irregular figure
To find the total volume we simply add the two volumes together. In doing so, we get 64+8 = 72 mm^3 as our volume.