Engineering Economics
What is the factor name of the formula [i(1+i)^n]/[((1+i)^n)-1]?

Single payment present worth
Capital recovery
Uniform series sinking fund
Uniform gradient future worth

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Engineering Economics
Which is NOT an essential element of an ordinary annuity?

Compound interest is paid on all amounts in the annuity.
The amounts of all payments are equal.
The payments are made at equal interval of time.
The first payment is made at the beginning of the first period.

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