Camden invested 7,200 in an account paying an interest rate of 4.4% 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 13,140?

פתרון

C am d e n in v es t e d 7, 200 in an a cco u n t p a y in g an in t eres t r a t e o f 4.4% 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 13, 140 ?

Time : 13.7

צעדי פתרון

Translate the problem into an equation:

13140 = 7200 (1 + \frac{0.044}{12})^{12 t}

13140 = 7200 (1 + \frac{0.044}{12})^{12 t}, t

פתור בשביל:

t = 13.7

Time : 13.7