On a saturday, ellen and carin agree to leave their homes at the same time, drive toward each other, and have lunch when they meet. they both drive for 2 hours. carin drives 5 miles per hour faster than ellen. ellen drives a total of 80 miles. how fast does each person drive? use the equation d=rt.

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?