Answer:
D. 520 in³
Step-by-step explanation:
The sculpture creates a stair shape by cutting out two portions of the larger rectangular prism. The large rectangular prism is formed by the dimensions l = 15, w = 4 and h = 12. The volume of this prism is found using
V = l*w*h = 15*4*12 = 720 in³
However, the sculpture cuts out two prisms with the same dimensions l = 5, w = 4, and h = 4. The volume of these portions is V = l*w*h = 5*4*4 = 80. Since there are two, subtract this volume twice from 720.
720 - 80 - 80 = 560 in³
