Answer:
Number of bags required = 486
Total cost to fill the window box = $2415.42.
Step-by-step explanation:
Volume of the rectangular prism = l × b × h
= 12 × 9 × 9 cubic feet
Volume of 1 bag of soil = 2 cubic feet
Number of bags required = [tex]\frac{12(9)(9)}{2}[/tex]
= 486
Cost of one bag = $4.97
Cost of 486 bags = 486 × 4.97 = 2415.42
Hence, total cost of filling the window box = 2415.42.