Engineering Economics
Perfect monopoly exists only if:

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
the single vendor is the only one who has the knowledge of the product

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Engineering Economics
In a cash-flow diagram:

A vertical arrow pointing up indicates a positive cash flow
Time 0 is considered to be the present
Time 1 is considered to be the end of time period 1
All of these

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Engineering Economics
Which one of the following definitions is correct?

All of these
The ratio debt-to-total assets is called Debt-to-total assets ratio
The ratio of total debt to share holder's equity is called 'debt ratio'
The ratio of earnings before interest and taxes for a particular reporting period to the amount of interest charges for the period is called interest coverage ratio

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