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.
Common factor is 4X
Rewriting the term we get: 
Step-by-step explanation:
We need to find the common factor of the expression: 
A common factor is the term that is common in all the terms of the expression.
In the given expression the common factor is: 4X because it is common in both terms


So, Common factor is 4X
Rewriting the term we get: 
Keywords: Factors
Learn more about factors at:
#learnwithBrainly
Multiply 250 by 120 and the answer is 300,000ft2
42 I think. I'm sorry if I'm wrong.. Hope this helped!!