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受欢迎的 Word Problems >

Kelly opened a savings account 4 years ago. The account earns 10% interest, compounded monthly. If the current balance is 300.00, how much did she deposit initially?

解答

Ke ll y o p e n e d a s a v in g s a cco u n t 4 ye a rs a g o . T h e a cco u n t e a r n s 10% in t eres t, co m p o u n d e d m o n t h l y . I f t h e c u rre n t ba l an ce i s 300.00, h o w m u c h d i d s h e d e p os i t ini t ia ll y ?

解答

Principal : 201.43

求解步骤

Translate the problem into an equation:

300 = P (1 + \frac{0.1}{12})^{12 \cdot 4}

求解

P, 300 = P (1 + \frac{0.1}{12})^{12 \cdot 4} : P = 201.43

Principal : 201.43

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