Which of the following expressions is equivalent to - 1/2 (2 – 2x) + 3? A) X + 2
B) x - 1
C) 2 - x
D) x - 2.5

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?