The life of a tire is normally distributed with a mean of 30,000 miles. The standard deviation is 2000 miles.

1. What is the probability that a tire last more than 28,000 miles?

2. Use your answer from #1. If a company purchased 2000 tires, how many would the company expect to last more than 28,000 miles?

The shelf life of a particular dairy product is normally distributed with a mean of 12 days and a standard deviation of 3 days.

3. What percent of the product lasts less than 6 days?