Roxanne owns a business and assigns two of her employees their shifts. She assigns the first employee shifts in blocks of 2 hours, and she assigns the second worker shifts in blocks of 12 hours. If both workers must receive the same number of hours, what is the minimum number of hours each must be assigned?

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?