Nathaniel answer the following subtraction problem incorrectly. 16.43-1.043=6.00

Evaluate the given expression if m=45 |-3m|

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

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?