The demand for a certain product is P-30-0.00x where is the number of its sold per week and p is the price in dollars which each one is sold The weekly revenue is given by R=xP what number of units sold produce a weekly revenue of $31,250

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