Engineering Economics
Aside from many sellers and many buyers, which one is a characteristic of perfect competition?

Free market entry and exit
Homogeneous product
Perfect information and absence of all economic friction
All of these

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Engineering Economics
In a cash flow series:

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

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