Mason is taking a multiple choice test with a total of 100 points available. Each question is worth exactly 5 points . What would be Mason's test score ( out of 100) if he got 9 questions wrong ? What would be his score if he got questions wrong?

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?