Answer:
4 ft³
Explanation:
Given similar pyramids with heights 12 ft and 4 ft, you want the volume of the smaller when the volume of the larger is 256 ft³.
Scale factor
The scale factor for volume is the cube of the scale factor for linear dimensions. The height of the smaller pyramid is 1/4 the height of the larger, so its volume will be (1/4)³ = 1/64 times that of the larger.
The volume of Pyramid B is (1/64)(256 ft³) = 4 ft³.