Skylar invested 3,100 in an account paying an interest rate of 3.3% compounded quarterly. Assuming no deposits or withdrawals are made, how long would it take, to the nearest year, for the value of the account to reach 4,720?

פתרון

S k y l a r in v es t e d 3, 100 in an a cco u n t p a y in g an in t eres t r a t e o f 3.3% co m p o u n d e d q u a r t er 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, 720 ?

Time : 12.79

צעדי פתרון

Translate the problem into an equation:

4720 = 3100 (1 + \frac{0.033}{4})^{4 t}

4720 = 3100 (1 + \frac{0.033}{4})^{4 t}, t

פתור בשביל:

t = 12.79

Time : 12.79