Answer:
The company used 55 concrete bricks.
Explanation:
We should first find the volume of one of the rectangular bricks.
10×6×4=240in³.
Now, let's divide 13,200in³ by 240in³.
13,200÷240=55
Hence, the company used 55 concrete bricks.
Hope this helps! (It's probably too complicated, I'm very sorry ;-;)