⅓ + 4/3 ? answer? anyone

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?

Me. i can't figure out this question. give an explanation too. .

Kayaks rent for $35 per day. which expression can you use to find the cost in dollars of renting 3 kayaks for a day?