Engineering Economics
What refers to the goods and services that are desired by human and will be acquired only after all the needs have been satisfied?

Producer products
Luxury
Necessity
Consumer products

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

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

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