Answer:
192
Explanation:
Step 1:
The volume of the prism is 3 cubic units. This means the prism can be filled with 3 unit cubes.
Step 2:
How many cubes with 1/4-unit side lengths can fit in a cube with 1-unit side lengths?
Step 3:
There are 64 cubes with 1/4-unit side lengths in 1 cubic unit.
Step 4:
Since the rectangular prism is made up of 3 cubic units, we would have 3*64 total cubes with 1/4-unit side lengths.
3*64=192
Step 5:
It takes 192 of the 1/4 unit cubes to fill the prism.