Final answer:
The volume of the box is 87.5 cubic feet, calculated by converting all measurements to the same unit (feet), and then using the formula for the volume of a rectangular prism: length × width × depth.
Step-by-step explanation:
To calculate the volume of a box, you use the formula for the volume of a rectangular prism, which is length (×) width (×) depth. However, all dimensions must be in the same units. First, we need to convert 30 inches to feet because 1 foot = 12 inches. So, 30" ÷ 12 = 2.5 feet.
Now that we have all dimensions in feet, we can calculate the volume:
Volume = 7' × 5' × 2.5' = 87.5 cubic feet.
Therefore, the volume of the box measured in cubic feet is 87.5 ft³.