Sara has 23 more colored pencils than dan. if s represents the number of colored pencils sara has and d represents the number of colored pencils dan has, the equation that can be used in this situation is, d+23=s . if dan has 18 colored pencils, how many colored pencils does sara have?

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?