This is the concept of volume of solid materials. Volume is of a rectangular prism is given by:
volume=length*width*height
length=6 units
width=3 units
height=4 units
thus;
volume=6*3*4=72 cubic units
Answer:
98-54+12-36
110-54-36
56-36
20<em>A</em><em>n</em><em>s</em>
C. −6, is the best option