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Here are my questions: 1)Apply linear programming to this problem. A firm wants to determine how many units of each of two products (products X and Y) they should produce in order to make the most money. The profit from making a unit of product X is $190 and the profit from making a unit of product Y is $112. The firm has a limited number of labor hours and machine hours to apply to these products. The total labor hours per week are 3,000. Product X takes 2 hours of labor per unit and Product Y takes 6 hours of labor per unit. The total machine hours available are 750 per week.c
(a) 1 X + 5 Y =< 750
(b) 2 X + 6 Y => 750
(c) 2 X + 5 Y = 3,000
(d) 1 X + 3 Y =< 3,000
(e) 2 X + 6 Y =>3,000
2) You would like to use the fixed-time period inventory model to compute the desired order quantity for a company. You know that vendor lead time is 5 days and the number of days between reviews is 7. Which of the following is the standard deviation of demand over the review and lead time if the standard deviation of daily demand is 8?
(a) About 27.7
(b) About 32.8
(c) About 35.8
(d) About 39.9
(e) About 45.0 3)Apply linear programming to this problem. David and Harry operate a discount jewelry store. They want to determine the best mix of customers to serve each day. There are two types of customers for their store, retail (R) and wholesale (W). The cost to serve a retail customer is $70 and the cost to serve a wholesale customer is $89. The average profit from either kind of customer is the same. To meet headquarters' expectations, they must serve at least 8 retail customers and 12 wholesale customers daily. In addition, in order to cover their salaries, they must at least serve 30 customers each day. Which of the following is one of the constraints for this model?
(a) 1 R + 1 W =< 8
(b) 1 R + 1 W => 30
(c) 8 R + 12 W => 30
(d) 1 R => 12
(e) 20 x (R + W) =>30
Calculate the tower height, Z, and tower diameter, D, needed so that the Z/D ratio is about 4 and at this optimum condition, what are the values of f, Tez, and air flow rate, G?
What is the net energy balance ratio for the production of biodiesel from soy. You are replacing a 75 W light bulb in your home that operates, on average, 6 hours per day. You can select from the three light bulbs shown in the table below. Note th..
Compartment A contains 0.2 mol of pure methane at 50 °C, 1 bar. Compartment B contains 0.8 mol of a methane-ethane mixture at 100 °C, 1 bar with ymethane = 0.5. The partition is removed and the system reaches equilibrium.
a super tanker is 360m long and has a width of 70m and draft of 25m. assuming that the drag is mainly due to the skin friction at the bottom and side faces and that the boundary layer develops naturally,
a. Develop a general equation that relates the average value of n to the mass of a given mixture of PCBs and the mass of AgCl produced. b. A 0.1947-g sample of a commercial PCB yielded 0.4791 g of AgCl. What is the average value of n for this samp..
At no load, rated voltage, and 1200 r/min, the armature current is 3 A. At full load and rated voltage, the line current is 40 A, and the flux is 5% less than its no-load value because of armature reaction. Compute the full-load speed.
If a wye-delta starting method is employed, find the starting current and the starting torque.
Assume the plant is built at time zero and begins operation at full rate in year 1. Assume the rate of corporate income tax is 35% and taxes must be paid based on the previous year's income.
determine the induced voltage at (a) full load, and (b) one-half full load. Neglect brush-contact drop.
The armature terminal voltage is halved, with the field current and load torque remaining the same. (c) The field current and the armature terminal voltage are halved, with the horsepower output remaining the same.
If the generated emfs are 200 and 210 V, respectively, determine the load voltage and the armature current of each machine.
Determine the current and the voltage in the load resistance.
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