Engineering Economics
What refers to the cumulative effect of elapsed time on the money value of an event, based on the earning power of equivalent invested funds capital should or will earn?

Present worth factor
Yield
Interest rate
Time value of money

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Engineering Economics
In a cash-flow diagram:

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

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