Sierra says that she can simplify the right side of the inequality shown by combining the terms within the parentheses but that she can't do the same thing on the left side. Is Sierra correct? Explain.

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