Sales of existing homes in the United States rose continuously over the period 2011-2013 at the rate of 8.9per year from 43 million in 2011. Write down a fomula that predicts sales of existing homes tyears after 2011. Use your model to estimate to the nearest 0.1 million, sales of existing homes in 2012 and 2014

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?