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Scientific Instruments, Inc. uses a MARR of 8 % per year. The company is evaluating a new process to reduce water effluents from its manufacturing processes. The estimates with the process are In evaluating the process on the basis of a rate of return analysis, the correct equation to use is: According to Descartes rule of signs, for a net cash flow sequence of --++-0+, the number of possible i values is: 2 3 4 5 6 All of the following are fundamental assumptions for an annual equivalent worth analysis except: All cash flows will have the same estimated values in every life cycle. The alternatives will be needed for only one life cycle. The selected alternative will be repeated for the succeeding life cycles in exactly the same manner as for the first lifecycle. The services provided are needed for at least the LCM of the lives of the alternates