Answer:
Answer: Volume = 81 cubic inches 
 
Step-by-step explanation: 
 
Given that each cube has length = 3/4 inches 
 
The height H = 3/4 × 8 = 6 inches 
 
Where 8 = number of cubes 
 
The length L = 3/4 × 6 = 4.5 inches 
 
Where 6 = number of cubes 
 
The width W = 3/4 × 4 = 3 inches 
 
Where 3 = number of cubes 
 
The volume V = L × W × H 
 
Substitute all the parameters into the formula 
 
V = 4.5 × 3 × 6 = 81 cubic inches 
 
Therefore, the volume of the rectangular prism is 81 cubic inches 
 
Explanation: