Engineering Economics
A farmer selling eggs at 50 pesos a dozen gains 20%. If he sells the eggs at the same price after the costs of the eggs rises by 12.5%, how much will be his new gain in percent?

0.0665
0.0689
0.0612
0.0658

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

The amounts of all payments are equal.
Compound interest is paid on all amounts in the annuity.
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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