SOLUTION: If I invested $3,000 and I earned $300 over six months, what is the principle?

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Question 905725: If I invested $3,000 and I earned $300 over six months, what is the principle?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
The principle is the amount invested which is $3000
The part that is unknown is the interest rate