Match each equation to one of the two tape diagrams. a. x + 3 = 9
b. 3 * x = 9
c. 9 = 3 * x
d. 3 + x = 9
e. x = 9 - 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?