The argument is valid by the law of detachment.
 
        
                    
             
        
        
        
Answer:
its because 1/2 = 0.50  and 1/4 = 0.25 
and 0.50 is greater than 0.25 
~batmans wife
 
        
             
        
        
        
You divide 47,000 by 8. You should get 5,875. That should be the answer
        
             
        
        
        
Suppose that this person drives at r mph going to the mountains, and gets there in 12 hours.  Returning, this person drives at (r+20) mph and gets home in 8 hours.  We don't know the distance yet, but can solve for the initial speed, r, by setting
d = 12r = (r+20)(8).  Solving for r, r=40 mph (going) and (40+20)mph = 60 mph (returning.  Since d=12 r, d = (12 hrs)(40 mph) = 480 miles (answer).