It would be 123,456,789 (if not counting decimals)
decimals would be like 0.123456789
        
                    
             
        
        
        
Answer:
The answer is "Option a, Option b, and Option d".
Step-by-step explanation:
In the given question it is used to stratifying the sampling if the population of this scenario it flights takes off when it is divided via some strata.
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In option a, In this case, it stratified the sampling, as the population of planes taking off has been divided into the days of the week.
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In option b, It also used as the case of stratified sampling.
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In options c, it is systematic sampling, that's why it is wrong.
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In option d,  It is an example of stratifying the sampling.
 
        
             
        
        
        
 you would divide 1700 by 40
1700/40= 42.5
there for the unit ratio would be 42.5 meters per minute
        
                    
             
        
        
        
B.4% at least that's what I got lol I did it at least twice in my head