Engineering Economics
What refers to the ratio of the interest payment to the principal for a given unit of time and usually expressed as a percentage of the principal?

Rate of return
Yield
Interest rate
Return of investment

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Engineering Economics
Which one of the following questions is relevant to the construction estimates?

All of these
How much money will the contractor's risk, loosing if he were to submit bid on the raw estimate of cost
Did the estimators precisely evaluate site conditions
Did the estimators use short cut methods which may be unrealistic in their situation

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