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Principal is _____.
The original amount invested
The total amount earned
Interest plus original amount invested
Interest on a loan
Interest is calculated by _____.
Adding the interest rate to the principal
Multiplying the principal by the interest rate
Multiplying the principal by the interest rate and the time
Multiplying the principal by the interest rate and dividing by the time

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antonsandiego
If my memory seves me well, the answers are:
1. Principal is the original amount invested. Due to it's definition.
2. Interest is calculated by multiplying the principal by the interest rate and the time. Also, it should be devided by 100 to make it clear.

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