The weight of a cat for 10 months is shown in the table. If In November the cat weighed 13.9 lbs, by how much did this increase the mean weight of the cat? (to the nearest tenth lbs)

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?