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Vocabulary flashcards for Week 11 covering simple and compound interest.
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Simple Interest
Interest calculated only on the initial principal, not on previously earned interest.
Compound Interest
Interest earned on both the principal and on accumulated interest from prior periods.
Principal
The original amount of money invested or loaned, before any interest.
Interest Rate
The percentage by which money grows per time period.
Time
The length of time money is invested or borrowed.
Amount (A)
Total value after interest accrues; for simple interest A = P(1 + rt) and for compound interest A = P(1 + r/n)^(nt).