On a map, 1/2 inch represents 4/5 mile. what distance on the map represents 1 mile? a 2/5 in.

b 5/8 in.

c 1/35 in.

d 2/12 in.

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?