Answer:
2
Step-by-step explanation:
Im am sorry if i get it wrong
 
        
                    
             
        
        
        
11.) All you've got to do is subtract thirty-eight(38) from eighty-one(81). This will result in 43.
81-38=43
12.) You've got to subtract eighty-seven(87) from ninety(90) which will give you the answer 3.
87-90=3
        
             
        
        
        
2/5,1/2,6/10 hope that helped!
        
                    
             
        
        
        
The average rate of change between 1991 and 1996 is 40 million
<h3>How to determine the average rate of change between 1991 and 1996?</h3>
The given parameters are:
Population in 1991 = 1.5 billion
Population in 1996 = 1.7 billion
The average rate of change between 1991 and 1996 is calculated as:
Rate = (1.7 billion -1.5 billion)/(1996 - 1991)
Evaluate
Rate = 40 million
Hence, the average rate of change between 1991 and 1996 is 40 million
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