Answer:
1 book = 108 inches^3
Step-by-step explanation:
I take that each book is 9 by 12 by 1
To find the volume you must times length, width, and height together
9*12*1 = 9*12 = 90 + 18 = 108 inches^3
To find the total volume of the stack take this number and multiply by number of books
