Someone please help the other part of this will be posted by the time your reading this *I DO GIVE Brainliest*

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

Janet drove 300 miles in 4.5 hours. write an equation to find the rate at which she was traveling

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?