Answer: (A)
Packing material is required to fill the box = [tex]\frac{3}{10} ft^{3}[/tex]
Step-by-step explanation:
The box is shaped like a rectangular prism
base area = 9/10 square foot
height = 1/3 foot
Volume of a prism = base area X Height
=[tex]\frac{9}{10}X \frac{1}{3}=\frac{3}{10} ft^{3}[/tex]