Which answer shows the foil mthod used to expand the product below (2x+3)(2x^2-5)
a.2x*2x^2+2x*(-5)+3*2x+3*(-5)
b.2x*2x^2+2x*(-5)+3*2x^2+3*(-5)
c.2x*2x^2+3*2x^2+2x^2*(-5)+3*(-5)

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