Draw 27 circles and take off 4.5 circles for every hour. The answer will be 6 hrs. 
Expression:
-27/-4.5 I believe
 
        
             
        
        
        
9514 1404 393
Answer:
   6
Step-by-step explanation:
Any of the three can be in first place.
Any of the remaining two can be in 2nd place.
The remaining swimmer will be in 3rd place.
There are 3 × 2 × 1 = 6 possible orderings of the swimmers.
  
        
             
        
        
        
Answer: whats the question here?
 
        
             
        
        
        
75% = 75 / 100 
= 0.75 
 = 75% * 0 
 = 0.75 * 0 
 = $0.00