In one round robin chess tournament, 36 games were played. how many players entered in the tournament?

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?

Solve the equation.then check your solution 8=1.88+a

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)