Answer:
The answer to your question is 732 in³
Explanation:
Data
Rectangular prism layers
Base layer = 12 in x 10 in x 4 in
Second layer = 3 in smaller x 4 in
Volume = ?
Formula
Total volume = Volume of the base layer + Volume of the second layer
Total volume = length 1 x width 1 x height + length 2 x width 2 x height
Substitution
Total volume = 12 x 10 x 4 + (12 - 3)(10 - 3)(4)
Simplification
Total volume = 480 + (9)(7)(4)
Total volume = 480 + 252
Result
Total volume = 732 in³