A combination for a padlock consists of 1 letter and 3 numbers. If there are 26

letters in the alphabet and 10 single digit counting numbers (including 0), how

many different padlock combinations are there?

Describe the relationship between the angles of similar triangles and the sides of similar triangles

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

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?