Determine whether the following events are mutually exclusive.

choosing a student who is a communications major or a business major from a nearby university to participate in a research study. (assume that each student only has one major.)

I'll give brainliest if you answer right : )

What two criteria are needed for triangles to be similar

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?