So the following is the answer of the following question in your problem and please do not post to many question in just one posting.
#1 The 98% confidence interval for the mean hours is between 6 and 50.
#2 The smallest margin of error between the two is southern florida with 1.8% margin of error.
$6 . It will cost $6 because spending 6 dollars , 50 times will equal $300
Answer:
move the decimal point two points to the right
The answer should be 31/10