7. A company has two mines. Mine A can produce 1 ton of high-grade iron ore, 3 tons of medium-grade iron ore, and 5 tons of low-grade iron ore every day; Mine B can produce 2 tons of each of these three types of iron ore every day. The company's demand for these three types of iron ore is at least 80 tons, 160 tons, and 200 tons respectively. Assume that these two mines each need to spend $2,000 per day to mine iron ore. How many days do these two mines need to mine to meet market demand with the lowest mining cost? (a) Try to define variables for the above problem and establish its linear programming model. (b) Solve the above linear programming problem.

7. A company has two mines. Mine A can produce 1 ton of high-grade iron ore, 3 tons of medium-grade iron ore, and 5 tons of low-grade iron ore every day; Mine B can produce 2 tons of each of these three types of iron ore every day. The company's demand for these three types of iron ore is at least 80 tons, 160 tons, and 200 tons respectively. Assume that these two mines each need to spend $2,000 per day to mine iron ore. How many days do these two mines need to mine to meet market demand with the lowest mining cost? (a) Try to define variables for the above problem and establish its linear programming model. (b) Solve the above linear programming problem.

Name: 7. A company has two mines. Mine A can produce 1 ton of high-gradeiro
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Description: 7. A company has two mines. Mine A can produce 1 ton of high-gradeiron ore, 3 tons of medium-grade iron ore, and 5 tons of low-grade ironore every day; Mine B can produce 2 tons of each of these three typesof iron ore every day . The company's deman

Calculus: Early Transcendentals

8th Edition

ISBN:9781285741550

Author:James Stewart

Publisher:James Stewart

Chapter1: Functions And Models

Section: Chapter Questions

Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...

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