Answer:

Step-by-step explanation:
The z-score tells us how many standard deviations a value is away from the mean.
The formula is: 

where x is the value,  is the mean, and s is the standard deviation.
 is the mean, and s is the standard deviation. 
We want to find the z-score for the score of an 83, the mean is 72, and the standard deviation is 5. 

Substitute the values into the formula. 

Solve the numerator. 

Divide. 

The z-score is 2.2, which means the score of 83 is 2.2 standard deviations above the mean. 
 
        
             
        
        
        
Answer:
it would be c
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
4/15 is your answer my friend
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
Is this the full question?
 
        
                    
             
        
        
        
It would be 20
21.3
-1.8
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19.5 rounded would be 20