the average lifespan of car tires. Suppose that the population mean is 60,000 miles, and the standard deviation has been determined to be 8,000 miles....

the average lifespan of car tires. Suppose that the population mean is 60,000 miles, and the standard deviation has been determined to be 8,000 miles. Imagine you're interested in determining the probability that a tire lasts less than 45,500 miles? What would it be? What if you are interested in determining the probability that a tire would have a lifespan greater than 80,300 miles?