Dirk, Monica, Jeanette, and Omar are making s'mores around a campfire. They have a bar of dark chocolate and a bar of milk chocolate, which they divide up to make one s'more for each person. How much chocolate do they use for each s'more?

Which of those sequences is a geometric sequence

Louise measured the perimeter of her rectangular scrapbook to be 154 cm. if the scrapbook is 45 cm wide, how long is the scrapbook?

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?