Engineering Economics
What is defined as the reduction of the value of certain natural resources such as mines, oil, timber, quarries, etc. due to the gradual extraction of its contents?

Deflation
Depletion
Depreciation
Inflation

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

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

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Engineering Economics
It is the practice of almost all banks in the Philippines that when they grant a loan, the interest for one year is automatically deducted from the principal amount upon release of money to a borrower. Let us therefore assume that you applied for a loan with a bank and the P80,000 was approved at an interest rate of 14% of which P11,200 was deducted and you were given a check of P68,800. Since you have to pay the amount of P80,000 one year after, what then will be the effective interest rate?

0.1647
0.1602
0.1632
0.1628

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