Engineering Economics
A VOM has a selling price of P 400. If its selling price is expected to decline at a rate of 10% per annum due to obsolescence, what will be its selling price after 5 years?

P 212.90
P 222.67
P 231.56
P 236.20

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Engineering Economics
Perfect monopoly exists only if:

the single vendor is the only one who has the knowledge of the product
the single vendor is the only one who has the permit to sell
the single vendor can prevent the entry of all other vendors in the market
the single vendor gets the absolute franchise of the product

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