I belive the answer would be....
49.5-37.5=12
2•12=24
        
                    
             
        
        
        
The 3 it is the one the bottom left corner
        
                    
             
        
        
        
Answer:
Rectangular Prism
Step-by-step explanation:
We usually see building shaped as a 3D rectangle. If this is the type of building you are talking about, we use a rectangular prism in order to build the building with correct measurements.
 
        
             
        
        
        
0.50x+25 would be the expression form of the situation