Consider the investment projects given in Table P7.17.
Table P7.17

(a) Use the quadratic formula to compute i* for A.
(b) Classify each project as either simple or non-simple.
(c) Apply the cash-flow sign rules to each project, and determine the number of possible positive i*s. Identify all projects having a unique i*.
(d) Compute the IRRs for projects B through E. Assume MARR = 12%.
(e) Apply the net-investment test to each project.

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Project Cash Flow 0 $150 $150$150 $100 $200 100 0 500 40 500 200 600 150 40 40 70-120 70 30 60 36 90 30 20