Mechanical engineer at Company B is considering five equivalent projects, some of which have different life expectations. Salvage value is nil for all alternatives. Assuming that the company’s MARR is 13% per year, determine which should be selected (a) if they are independent, and (b) if they are mutually (c) Explain why your selection in part (b) is correct.     First Cost, $ Net Annual Income, $/Year Life, Years A -20,000 +5,500 4 B −10,000 +2,000 6 C −15,000 3,800 6 D −60,000 +11,000 12 E −80,000 +9,000 12

ENGR.ECONOMIC ANALYSIS
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Chapter1: Making Economics Decisions
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    1. Mechanical engineer at Company B is considering five equivalent projects, some of which have different life expectations. Salvage value is nil for all alternatives. Assuming that the company’s MARR is 13% per year, determine which should be selected (a) if they are independent, and (b) if they are mutually (c) Explain why your selection in part

    (b) is correct.

     

     

    First Cost, $

    Net Annual Income,

    $/Year

    Life, Years

    A

    -20,000

    +5,500

    4

    B

    −10,000

    +2,000

    6

    C

    −15,000

    3,800

    6

    D

    −60,000

    +11,000

    12

    E

    −80,000

    +9,000

    12

     

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