Anton is seeking an advanced degree that requires an investment of 70,000 and a three year commitment during which he will lose 20,000 a year income. Even without cinsidering the interest lost on the investment and lost earnings, how long (in years) will it take him to recover his investment if he makes 10,000 more per year after completing his degree?

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?