Which of the following scenarios describe proportional relationships? Check all that are true.

• A punch recipe requires 8 ounces of sorbet for each gallon of
lemon-lime soda.

• The bakery sells doughnuts at $2.75 for each 1/2 dozen.

Jon earns 7 hours of vacation time for each 80 hours he works.

• Cicely swims 5 kilometers on Wednesday, 10 kilometers on
Thursday, and 7 kilometers on Friday.

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?