Answer: C. 
Step-by-step explanation:
The confidence interval for difference of two population mean is given by :-
Given : Level of significance : 
Then , significance level : 
Critical value : 
Hence, a 99% confidence interval for the difference between the mean wait times of everyone who rode both rides
I don't know if I understand the question but I think it is 15
Answer: Id say C.
Step-by-step explanation: The other two can't possibly be a function.
<h2><em>Mark as brainliest if im correct please</em></h2>
In this case if x<100 George will be losing money. So he will only earn a profit when he sells more than 100 DVDs. Essentially (x-100) represents his break-even point.
