No. 
Tom forgot about the area of the top/roof, the floor and roof are different dimensions/areas, making his method incomplete.
He needs to find area of Roof, Floor then times height.
        
                    
             
        
        
        
By multiplying both sides of an equation by a number, you can eliminate all decimals and fractions, so the answer is C.
        
             
        
        
        
Answer:
240
Step-by-step explanation:
volume of rectangular prism formula:
length*width*height
2.5*8*12=240
 
        
             
        
        
        
Answer:
6 divided by 4=6/4 (bottom left)
Step-by-step explanation:
You're dividing a 6 meter area into 4 parts, so you're dividing 6 by 4 (6/4 m)