Can some one please help me

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?

The volume of a cube-shaped shipping container is 13,824 cubic inches. find the edge length of the shipping container.

If g^-1(x) is the inverse of g (x) which statement must be true