Hello kindly help me with this one. I need it right now

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?

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

If f(x) = 6x – 4, what is f(x) when x = 8? a2 b16 c44 d52