Question: When comparing mutually exclusive alternatives that have different lives by the present worth method, it is necessary to: (a) Always compare them over a period

When comparing mutually exclusive alternatives that have different lives by the present worth method, it is necessary to:

(a) Always compare them over a period equal to the life of the longer-lived alternative

(b) Always compare them over a time period of equal service

(c) Always compare them over a period equal to the life of the shorter-lived alternative

(d) Find the present worth over one life cycle of each alternative

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