18 19 20

18 19 20

QUESTION 18

1.

Solve this linear programming problem.What is the optimal value of the objective function?

Maximize $3x + $5y

subject to:

8x + 14y

9x + 12y

Answer

Less than or equal to 30
Greater than 30 but Less than or equal to 40
Greater than 40 but Less than or equal to 50
Greater than 50 but Less than or equal to 60
Greater than 60

5 points

QUESTION 19

1.

1. Solve this linear programming problem.What is the shadow price (dual value) for the first constraint?

Maximize $3x + $5y

subject to:

8x + 14y

9x + 12y

Answer

Less than or equal to 0.5
Greater than 0.5 but Less than or equal to 1
Greater than 1 but Less than or equal to 2
Greater than 2 but Less than or equal to 5
Greater than 5

QUESTION 20

1.

ABC Logistics Inc. has four warehouses (A, B, C, and D) that require monthly shipments of 300, 350, 500, and 550 units per month, respectively. Its three plants (1, 2, and 3) have monthly capacities of 600, 450, and 650, respectively. Plant capacities, warehouse needs and shipping costs (in $) are shown in the following table. For example, the shipping cost from Plant 1 to Warehouse A is $15 per unit.

Warehouse

Plant

A

B

C

D

1

15

9

12

16

2

18

15

19

20

3

14

18

19

11

What is the optimal shipping cost?

Answer

Less than or equal to $10,000
Greater than $10,000 but Less than or equal to $15,000
Greater than $15,000 but Less than or equal to $20,000
Greater than $20,000 but Less than or equal to $25,000
Greater than $25,000

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