Which of the following is a polynomial? O A. x+2
x2
O B. x*-1
O c. 7x-2x4 + 3
O D. (x8 - 2)/(x2 + 3)

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? 0.62 0.78 0.84 0.96