The sum of a number (n) and 14 is 72 which equation shows this relationship

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?

Which graph or graphs appear to show a sinusoid? < me asap !

3/8 of the students in ms. mull’s class ride the bus. if there are 24 students in the class, how many students ride the bus?