The perimeter of a triangle is 10 inches. One side is 3 9/16 inches long. Another side is 4 5/8 inches long. About how many inches long is the third side? Explain how you estimated.

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?