A ferry travled 1/6 of the distance between 2 ports in 3/7 hours, the ferry travles at a constant rate. At this rate, what fraction of the distance between the two ports can the ferry travel in one hour?

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?