The human resources manager at a company records the length in hours, of one shift at work, X. He creates the probabity
distribution below. What is the probability that a worker chosen at random works at least 8 hours?

Ineed to learn how to solve this problem

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).

Graph g(x)=2cosx . use 3.14 for π . use the sine tool to graph the function. graph the function by plotting two points. the first point must be on the midline and closest to the origin. the second point must be a maximum or minimum value on the graph closest to the first point.