In the circle below, find x and y

The human resources manager at a company records the length, in hours, of one shift at work, x. he creates the probability distribution below. what is the probability that a worker chosen at random works at least 8 hours? probability distribution px(x) 6 hours 7 hours 8 hours 9 hours 10 hours 0.62 0.78 пол

Plz hurry evaluate the expression a+b where a=8 and b=19

Which number line correctly shows 0.8 + 0.3?