In 2 years, Victoria wants to buy a bicycle that costs 700.00. If she opens a savings account that earns 10% interest compounded annually, how much will she have to deposit as principal to have enough money in 2 years to buy the bike?

解答

I n 2 ye a rs, Vi c t or ia w an t s t o b u y a bi cyc l e t ha t cos t s 700.00. I f s h e o p e n s a s a v in g s a cco u n t t ha t e a r n s 10% in t eres t co m p o u n d e d ann u a ll y, h o w m u c h w i ll s h e ha v e t o d e p os i t a s p r in c i p a l t o ha v e e n o ug h m o n ey in 2 ye a rs t o b u y t h e bik e ?

Principal : 578.51

求解步骤

Translate the problem into an equation:

700 = P (1 + \frac{0.1}{1})^{1 \cdot 2}

求解

P, 700 = P (1 + \frac{0.1}{1})^{1 \cdot 2} : P = 578.51

Principal : 578.51