Engineering Economics
What is the type of annuity where the payments are made at the end of each period starting from the first period?

Deferred annuity
Perpetuity
Annuity due
Ordinary annuity

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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
All of these
The gradient in the cash flow may be positive or negative

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