Engineering Economics
What is defined as any tangible economic activity that contributes directly or indirectly to the satisfaction of human want?

Services
Commodities
Goods
Goods or commodities

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Engineering Economics
In a cash flow series:

Either an increase or decrease in the amount of a cash flow is called the gradient
All of these
The gradient in the cash flow may be positive or negative
Uniform gradient signifies that an income or disbursement changes by the same amount in each interest period

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