Engineering Economics
A investor wishes to earn 7% on his capital after payment of taxes. If the income from an available investment will be taxed at an average rate of 42%, what minimum rate of return, before payment of taxes, must the investment offer to be justified?

0.1207
0.1287
0.1234
0.1267

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Engineering Economics
Perfect monopoly exists only if:

the single vendor gets the absolute franchise of the product
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

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