Rectangle RSTU has vertices on the coordinate plane. If the slope of = , then the slope of = . Type a numerical answer in the space provided. If necessary, use the / key for a fraction bar. Do not type spaces in your answer.

The weekly amount spent by a company for travel has an approximately normal distribution with mean = $550 and standard deviation = $40. a) what is the probability that the actual weekly expense will exceed $570 for more than 20 weeks during the next year? (note: one year = 52 weeks) b) what is the probability that actual weekly expenses exceed $580 for 10 or more, but 16 or fewer weeks during the next year?