The volume of a rectangular box can be solved using the formula:
In the diagram, the length = 3 1/2 or 3.5 feet, width = 3 1/8 feet, and height = 4/5 foot.
Let's plug in these values to the formula above.
Let's convert first the mixed number to improper fractions.
We can multiply the fractions directly. Numerator to numerator, denominator to denominator.
Then, simplify.
Therefore, the volume of the box is 8 3/4 cubic feet. (Fourth Option).