Solve the linear programming problem by the method of corners. Maximize P = x + 2y     subject to   x  +  y  ≤ 4   2x  +  y  ≤ 7   x ≥ 0, y ≥ 0

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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  • TMA manufactures 37-in. high definition LCD televisions in two separate locations, Locations I and II. The output at Location I is at most 6000 televisions/month, whereas the output at Location II is at most 5000 televisions/month. TMA is the main supplier of televisions to the Pulsar Corporation, its holding company, which has priority in having all its requirements met. In a certain month, Pulsar placed orders for 3000 and 4000 televisions to be shipped to two of its factories located in City A and City B, respectively. The shipping costs per television from the two TMA plants to the two Pulsar factories are as follows.
      To Pulsar Factories  
  From TMA City A City B
  Location I $7 $3
  Location II $8 $9
TMA will ship x televisions from Location I to city A and y televisions from Location I to city B. Find a shipping schedule that meets the requirements of both companies while keeping costs to a minimum.
(x, y)
$=
  • Solve the linear programming problem by the method of corners.
    Maximize P = x + 2y    
    subject to   x  +  y  ≤ 4
      2x  +  y  ≤ 7
      x ≥ 0, y ≥ 0
    The maximum is P =  at 
    (x, y) = 
      • Bata Aerobics manufactures two models of steppers used for aerobic exercises, x number of luxury models and y number of standard models. Manufacturing each luxury model requires 10 lb of plastic and 10 min of labor. Manufacturing each standard model requires 16 lb of plastic and 8 min of labor. The profit for each luxury model is $45, and the profit for each standard model is $30. If 6000 lb of plastic and 60 labor-hours are available for the production of the steppers per day, how many steppers of each model should Bata produce each day in order to maximize its profit?
        (x, y)  = 
         
         
         
         
         
          
         
        What is the optimal profit?
        $ Solve the linear programming problem by the method of corners.
        Minimize C = 2x + 6y
        subject to   x  +  y  ≥ 3
          x  +  2y  ≥ 5
          x ≥ 0, y ≥ 0
        The minimum is C =   at 
        (x, y) =
      • David owns $20,000 worth of 10-year bonds of Ace Corporation. These bonds pay interest every 6 months at the rate of 2%/year (simple interest). How much income will David receive from this investment every 6 months?


        How much interest will David receive over the life of the bonds?
      • Find the simple interest on a $1400 investment made for 5 years at an interest rate of 6%/year. What is the accumulated amount? (Round your answers to the nearest cent.)
        simple interest
        accumulated amount  

        $

      • Find the effective rate corresponding to the given nominal rate. (Use a 365-day year.)
        4%/year compounded semiannually
         %/year
      • Find the effective rate of interest corresponding to a nominal rate of 3.8%/year compounded annually, semiannually, quarterly, and monthly. (Round your answers to two decimal places.)
        annually      %
        semiannually      %
        quarterly      %
        monthly      %
      • Determine the simple interest rate at which $2400 will grow to $2571 in 9 months. (Round your answer to two decimal places.)
         %/year
      • How many days will it take for $1900 to earn $12 interest if it is deposited in a bank paying simple interest at the rate of 4%/year? (Use a 365-day year. Round your answer up to the nearest full day.)
         days
      • Having received a large inheritance, Jing-mei's parents wish to establish a trust for her college education. Nine years from now they need an estimated $150,000. How much should they set aside in trust now if they invest the money at 6.2%/year compounded quarterly? Continuously? (Round your answers to the nearest cent.)
        quarterly$ continuously$ 
      • Find the accumulated amount after 5 years if $4000 is invested at 2%/year compounded continuously. (Round your answer to the nearest cent.)
      • A bank deposit paying simple interest at the rate of 8%/year grew to $2000 in 10 months. Find the principal. (Round your answer to the nearest cent.)
      • Use logarithms to solve the problem.
        How long will it take an investment of $3000 to triple if the investment earns interest at the rate of 3%/year compounded daily? (Round your answer to two decimal places.)
         yr
      • A beneficiary of a trust fund established for him 16 years ago at his birth. If the original amount placed in trust was $50,000, how much will he receive if the money has earned interest at the rate of 9%/year compounded annually? Compounded quarterly? Compounded monthly? (Round your answers to the nearest cent.)
        compounded annually    
        compounded quarterly    
        compounded monthly    
      • Find the accumulated amount at the end of 10 months on a $1200 bank deposit paying simple interest at a rate of 9%/year. (Round your answer to the nearest cent.)
      • A bank deposit paying simple interest grew from an initial amount of $1000 to $1050 in 6 months. Find the interest rate.
         %/year
      • Find the accumulated amount A if the principal P is invested at the interest rate of r/year for t years.
        P = $2500, r = 5%, t = 13
        1
        2
        ,
         compounded semiannually
        A = $ 
      • 7.5, Chris invested $10,000 in a retirement fund that grew at the rate of 2.82%/year compounded quarterly. What is his account worth today? 
      • P = $210,000, 
        r = 2.5%,
         t = 3, compounded daily, A=$
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