An empty box is shaped like a rectangular prism. the box has a base area of 9/10 square foot and a height of 1/3 foot. how much packing material is required to fill the box?
a. 3/10 ft^3
b. 1/10 ft^3
c. 1/3 ft^3
d. 2/3 ft^3

Since we already know the base area, we simply have to multiply it by the height to get the volume of the box (how much packing material it can contain)

9/10 x 1/3 

9     x     1   =  3
10          3       10       (I cancelled the 9 and 3 and made them 3 and 1                                                          respectively)
The answer is 3/10 ft³