Ella invested 2,700 in an account paying an interest rate of 5.4% compounded monthly. Assuming no deposits or withdrawals are made, how long would it take, to the nearest year, for the value of the account to reach 4,020?

解答

Ell a in v es t e d 2, 700 in an a cco u n t p a y in g an in t eres t r a t e o f 5.4% co m p o u n d e d m o n t h l y . A ss u min g n o d e p os i t s or w i t h d r a w a l s a re ma d e, h o w l o n g w o u l d i t t ak e, t o t h e n e a res t ye a r, f or t h e v a l u e o f t h e a cco u n t t o re a c h 4, 020 ?

Time : 7.39

求解步骤

Translate the problem into an equation:

4020 = 2700 (1 + \frac{0.054}{12})^{12 t}

求解

t, 4020 = 2700 (1 + \frac{0.054}{12})^{12 t} : t = 7.39

Time : 7.39