Pretty sure the answer is 29/20 or 1 9/20. You get this by find the common denominator , 60, and then adding the number all together and simplifying
        
                    
             
        
        
        
I only could find part of the triangle sorry, but u1 is 2 radical 2
        
             
        
        
        
the answer is b Im pretty sure
 
        
             
        
        
        
The wall has an area of 8 * 100 = 800 square feet
So therefore 800/400 = 2 gallons are required the answer is C