You have a pool that measures 8 yards by 10 yards. you want to build a deck around all four sides of the pool and you want to increase the total area to 120 square yards. the deck is the same width on both sides forming a perfect rectangle. what is the width of the deck?

The ages of personnel in the accounting department of a large company are normally distributed with a standard deviation of 7 years. there is a 0.02275 probability that the age of any randomly chosen person in the department is less than 22 and 0.15866 probabilty that the age of any randomly chosen person is greater than 43. what is the mean of this distribution?