If f(a) = 3a – a2, which of the following are not true statements? select all that apply. f(4) = -4 f(3) = 0 f(-1) = 2 f(0) = 3 f(-5) = -40

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?