<h3>
Answer:   78.6</h3>
Work Shown:

Multiply across the rows to form a third column. Example: 9*90 = 810 in the first row.

The values in the third column add to 810+1440+1050 = 3300
Divide this over the total number of people which is 9+18+15 = 42
The mean is 3300/42 =78.571 approximately which rounds to 78.6 
 
        
        
        
I think  you can put bench mark place valie round tenth thousnadth
        
             
        
        
        
Answer:
y=3/4x+5 
Step-by-step explanation:
 
        
             
        
        
        
Answer:
The average maximum heart rate for a 20 year old is <u>200 bpm</u>
The target heart rate is <u>100-170 beats per minute (bpm).</u>
I Hope this helps and I hope everything is okay!
 
        
                    
             
        
        
        
Answer:
a) 50
b) 6.71
c) 0.0681
Step-by-step explanation:
check the attached file below