Tessa is rolling a number cube labeled 1-6. what is the probability of tessa not rolling a 1,2,5 or 6?

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?

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0

Plz ( true - false) all triangles have interior angles whose measure sum to 90.