What key phrase suggests that the formula A=P×(((1+(r)/(n))^n⁢t−1)/((r)/(n))) can be used to calculate interest earned on an investment?

The phrase “periodic deposits” is the key clue. This formula calculates the future value of an investment when equal payments are deposited regularly and earn compound interest. A certificate of deposit is an investment product, while simple interest does not use this formula.

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