Please help 14 points

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?

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?

Shannon drove for 540 minutes. if she traveled 65 miles per hour,how many total miles did she travel?