Tom uses a fixed time period inventory system in his store. He counts his inventory every 30 days and then makes an order. Eight days later his order shows up from the supplier. On one ordering occasion, he counts and finds 21 units in inventory. If the average daily demand is 15 units, the standard deviation of the (review period lead time) demand is 24 units, and Tom desires a service level of 90%, about how many units should Tom order

Which statement below best describes george waring's approach to solving the problems of water-borne illness? a. waring is going with his "gut," because he believes that instincts and emotions are the best guides for action. b. waring efficiently and thoroughly lays out the case for why the problems are too large and overwhelming to be solved: people should just move out of cities back to their farms. c. waring has gathered the testimonies of people who live in densely populated areas in order to learn how they themselves have solved their problems. d. waring exhibits the industrial age's increased respect for and reliance on science and the scientific method.