Answer is d, its simple....
        
             
        
        
        
So maybe it’s 5, it’s equivalent to the side with 6, just shorter
        
             
        
        
        
The average of those five amounts is 183,636.7 
AVeraging is adding all of the numbers together with the dividing by a number of numbers you have. 
        
             
        
        
        
The ratio of 7200 to 6400 equals 1.125 in decimal form. I hope this helps!:)
        
                    
             
        
        
        
Answer:
The answer is 600 minutes (10 hours)
Step-by-step explanation:
20 minutes = 1 student.
30 students x 20 = 600 minutes
600mins / 60 (because an hour has 60 mins) = 10 hours.