An elephant weighs 15,000 pounds on earth and 2,500 pounds of the moon. Assuming the weights are proportional, what percent of its weight on earth is its weight on the moon?

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?