Final answer:
To find the cost of 8 pieces of red oak, multiply the total board footage by the cost per board foot.
Step-by-step explanation:
To find the cost of 8 pieces of red oak, we need to calculate the total cost per board foot and then multiply that by the total board footage of the oak pieces.
Given that each piece of red oak is 3/4" thick, 6.5" wide, and 5' long, we can calculate the board footage of one piece by multiplying the thickness, width, and length:
Board footage = thickness * width * length = (3/4) * 6.5 * 5 = 19.375 cubic feet.
Since there are 8 pieces, the total board footage is 8 * 19.375 = 155 cubic feet.
The cost per board foot is $2.80, so the total cost would be 155 * $2.80 = $434.