How many terms in the geometric series
a1 = 4, r = 4, Sn = 5460

Adding and subtracting matricesfind the value of each variable. x = and y = would

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