Engineering Economics
If ‘P’ is principal amount, ‘i’ is the rate of interest and ‘n’ is the number of periods in years, then the interest factor is:

ni
None of these
(ni - 1)
(1 + ni)

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Engineering Economics
In a cash-flow diagram:

Time 1 is considered to be the end of time period 1
Time 0 is considered to be the present
All of these
A vertical arrow pointing up indicates a positive cash flow

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