Final answer:
To find the number of sheets in the stock, divide 9 inches by 3/4 inch: 9 ÷ 3/4 = 12 inches.
Step-by-step explanation:
To find out how many inches of plywood are in a stock of 9 inches high, we need to divide the height of the stock by the thickness of a single sheet of plywood. In this case, the thickness of a single sheet of plywood is 3/4 inch.
So, to find the number of sheets in the stock, we divide 9 inches by 3/4 inch:
9 ÷ 3/4 = 9 × 4/3 = 12 inches
Therefore, there are 12 inches of plywood in a stock of 9 inches high.