One leg of a right triangle measures 4 inches length of the hypotenuse measures 4.1 inches how long in inches is the other leg

Let w=23 . what is the value of w + 45 ?

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?

What does independent variable and dependent variable mean in math?