Please help with these questions, will reward brainliest to those with correct answers. Thank you!

1. if events a and b are non-overlapping events, how do you find the probability that one or the other occurs? 2. what does it mean if p(a or b) equals 1?

Find the root(s) of f (x) = (x- 6)2(x + 2)2.

Find the measure for the angle indicated in bold