1. The average amateur golfer can hit a ball with an initial upward velocity of 29.4 meters per second. The height can be modeled by the equation h = -4.912 + 29.4t, where h is the height of the ball, in meters, after t seconds. a) What is the maximum height of the ball?

b) How long did it take for the ball to hit the ground?

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?