Asap. will mark need by today its due ! !

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .

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?

Acircle has a circumference of 28.36 units what is the diameter of the circle