5. Find the length of DE if D is between points Cand E, CD= 6.5 centimeters, and CE = 13.8 centimeters. 6. Find the length of XZ. 4x + 3

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?