Help a brotha out pls

The vet charges $45 for an office visit and $10 for each vaccination your dog needs. write an eaquation

Can someone me do math because i am having a breakdown rn because i don’t get it

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?