Heather earned some money doing odd jobs last summer and put it in a savings account that earns 3% interest compounded annually. After 4 years, there is 700.00 in the account. How much did Heather earn doing odd jobs?

الحلّ

He a t h er e a r n e d so m e m o n ey d o in g o dd j o b s l a s t s u mm er an d p u t i t in a s a v in g s a cco u n t t ha t e a r n s 3% in t eres t co m p o u n d e d ann u a ll y . A f t er 4 ye a rs, t h ere i s 700.00 in t h e a cco u n t . Ho w m u c h d i d He a t h er e a r n d o in g o dd j o b s ?

Principal : 621.94

خطوات الحلّ

Translate the problem into an equation:

700 = P (1 + \frac{0.03}{1})^{1 \cdot 4}

700 = P (1 + \frac{0.03}{1})^{1 \cdot 4}, P

حلّ لـ:

P = 621.94

Principal : 621.94