If you toss four coins, what is the probability that you will get exactly 1 or 4 heads? tell whether these events are overlapping or non-overlapping.

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

The complement of an angle is one-sixth the measure of the supplement of the angle. what is the measure of the complement angle?

The bottom of ignacio's desktop is 74.5cm from the floor. ignacios sits in his adjustable chair, and the tops of his legs are 49.3cm from the floor. each clockwise rotation of the knob on the chair raises ignacio's legs by 4.8cm. write an inequality to determine the number of clockwise rotations, r, ignacio could make with the knob without his legs touching the desk.