area of a circle a is given by the formula A= pi r squared where r is the circle's radius. the formula to find r is ___. if A= 54 centimeters squared and pi= 22/7, r is ___ centimeters

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