A random sample of 20 round trip flights between Philadelphia and Dallas has an average airfare of $470.40 with a sample standard deviation of $58.70. The 95% confidence interval around this sample mean is .

answer:

a=9

step-by-step explanation: lmk if you need a explanation

aloha~! my name is zalgo and i am here to you out on this amazing day. to answer your question, yes, nonzero numbers can have a greatest common factor and that would be 1. still don't get it? let me considering every number is divisible by 1 and hence every number has 1 as a factor of theirs. so, if 2 nonzero numbers didn't share any gcf (greatest common factor), they would still have a factor in common and that would be 1.

i hope that this ! : p

"stay and stay proud! " - zalgo

(by the way, do you mind marking me as brainliest? i'd greatly appreciate it! mahalo! x3)

the answer for this is 0.25 km. : )