Final answer:
The actual size of 1x8 lumber is approximately 0.75 inches by 7.25 inches.
Step-by-step explanation:
1x8 lumber refers to a specific type of lumber with a nominal size of 1 inch by 8 inches. However, the actual dimensions may be slightly smaller due to the milling process.
This means that the actual size of 1x8 lumber may be around 0.75 inches by 7.25 inches.