How should this problem be solved? (as)o a.3 2 5o c

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out

Wrote and expression for the difference of p and 4