1. Three types of gasoline are manufactured by a company ? Regular, Super, and Extra. Regular should have at least I l percent additive 1 and 17 percent additive 2. Super should have at least 13 percent additive I and 22 percent additive 2. Extra should have at least 17 percent additive 1 and 19 percent additive 2. These are made by using two crudes ? A and B. Crude A cost $28 per barrel and is 14 percent additive 1 and 18 percent additive 2. Crude B costs $30 per barrel and is 20 percent additive 1 and 24 percent additive 2. The demand for Regular is projected to be 1,000 barrels, while each of the others has a demand of 2,000 barrels. Formulate this as a linear programming problem to minimize cost while meeting all constraints.

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2. A small software development project has four major activities. The times are estimated and Provided in the table below.

(a) What is the expected completion time for this project?

(b) Draw the network and state the ES, EF, LS,LF, slack in a Table.

(c) State the critical path ?

(d) What is the expected variance of the critical path?

Transcribed Image Text:

Activit Immediate Predecessor y A BCDEFGH I - A A B D с E, F C G, H a 2 3 4 2 3 6 1 63 m S675 5 6 5 3 8 1 10 4 b 8 9 10 14 3 10 1 14 5 Activit Immediate Predecessor y A BCDEFGH I - A A B D с E, F C G, H a 2 3 4 2 3 6 1 63 m S675 5 6 5 3 8 1 10 4 b 8 9 10 14 3 10 1 14 5

Answer rating: 100% (QA)

Let the Additive A be x and Additive B be y Cost of Crude A 28 014x 018y 392x 504... View the full answer