if 8 boards are stacked on top of each other and each board is 2 1/4 inches thick, how high is the stack?

1 answer

To find the total height of the stack, we need to multiply the thickness of each board by the number of boards.

Thickness of each board = 2 1/4 inches = (2 + 1/4) inches = 9/4 inches

Number of boards = 8

Total height = (9/4) inches/board * 8 boards = 72/4 inches = 18 inches

The stack is 18 inches high.