
MINIMIZING OIL REFINERY COSTS An oil company operates two refineries in a certain city. Refinery I has an output of 200,100, and 100 barrels of low-, medium-, and high-grade oil per day, respectively. Refinery II has an output of 100, 200, and 600 barrels of low-, medium-, and high-grade oil per day, respectively. The company wishes to produce at least 1000, 1400, and 3000 barrels of low-, medium-, and high-grade oil, respectively, to fill an order. If it costs $200/day to operate Refinery I and $300/day to operate Refinery II, determine how many days each refinery should be operated to meet the production requirements at minimum cost to the company. What is the minimum cost?

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Chapter 4 Solutions
EBK FINITE MATHEMATICS FOR THE MANAGERI
- pls helparrow_forwardA tank holds a 135 gal solution of water and salt. Initially, the solution contains 21 lb of salt. A salt solution with a concentration of 3 lb of salt per gal begins flowing into the tank at the rate of 3 gal per minute. The solution in the tank also begins flowing out at a rate of 3 gal per minute. Let y be the amount of salt present in the tank at time t. (a) Find an expression for the amount of salt in the tank at any time. (b) How much salt is present after 51 minutes? (c) As time increases, what happens to the salt concentration?arrow_forwardpls helparrow_forward
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