Bradley and meddy have a set of rectangular blocks that have side lenght mesurments of 5cm by 5cm by 10cm. bradley and meddy stack the blocks differently but are consistent in the placement of the blocks when building their individual towers. determine the possible growth rates of their towers.

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?