Step-by-step explanation:

Answer:
The margin of error (E) 
Step-by-step explanation:
Given,
mean 
standard deviation 
sample size 

Critical value


Critical value 


The margin of error (E) 


Hence, The margin of error (E) 
Complete question is attached in below.
39 and 36. both of them rounded to the nearest 10 is 30
4(20+12)/(4-3) = 4(32)/1 = 128
Use order of operations (PEMDAS) Please Excuse My Dear Aunt Sally, and solve for parantheses, then multiply parentheses and then divide by 1.
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➷ 1 meter is 1000 millimeters
Therefore, we have to divide by 1000
71/1000 = 0.071
Therefore, your answer is option A.
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