The correct answer is C
to get 5 to 100, multiply by 20, so multiply 3 by 20 as well. 
        
             
        
        
        
Answer:
13
Step-by-step explanation:
First find the average the numbers (40 / 4 = 10)
2 are more and 2 are less
7, 9, 11, 13
 
        
                    
             
        
        
        
Five-5
three-3
"the quantity five plus three" (5 + 3) 
"one hundred times the quantity ..." means  100 (5 + 3)   
now just solve 100(5+3) 
solve the parentheses first (5+3) = 8
Now you are left with 100(8) or 100*8
when you solve your answer is 800
        
             
        
        
        
The height of flagpole is 12.5 feet.
Step-by-step explanation:
Given, 
Height of woman = 5 foot 
Shadow of woman = 6 feet 
Ratio of height to shadow = 5:6
Shadow of flagpole = 15 foot 
Height of flagpole = x
Ratio of height to shadow = x:15
Using proportion;
Ratio of height to shadow :: Ratio of height to shadow 

Product of mean = Product of extreme

Dividing both sides by 6

The height of flagpole is 12.5 feet.
Keywords: ratio, proportion 
Learn more about proportion at:
#LearnwithBrainly
 
        
             
        
        
        
He would need to exercise for approximately 14 minutes to get to 120 bpm