Allison invested 23,000 in an account paying an interest rate of 6.7% compounded annually. Assuming no deposits or withdrawals are made, how long would it take, to the nearest year, for the value of the account to reach 76,300?

פתרון

A ll i so n in v es t e d 23, 000 in an a cco u n t p a y in g an in t eres t r a t e o f 6.7% co m p o u n d e d ann u a ll 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 76, 300 ?

Time : 18.49

צעדי פתרון

Translate the problem into an equation:

76300 = 23000 (1 + \frac{0.067}{1})^{1 \cdot t}

76300 = 23000 (1 + \frac{0.067}{1})^{1 \cdot t}, t

פתור בשביל:

t = 18.49

Time : 18.49