# Thread: Hi! I need help to solve compound intrest using loghttp://mathhelpforum.com/images/sm

1. ## Hi! I need help to solve compound intrest using loghttp://mathhelpforum.com/images/sm

hi there could anybody solve this compound interest question with the help of log for me for me ? p=100 t=30 years A=100000 R=? given log 2= 0.3010 and log 1259=3.1 Please show me full solution http://mathhelpforum.com/images/smil...106-crying.gif

2. ## Re: Hi! I need help to solve compound intrest using loghttp://mathhelpforum.com/image

Hi

The formula for compound interest (when computed continuously over each year) is:

$A=P*e^{Rt}$

$R=\frac{1}{t}\log{\frac{A}{P}}=\frac{1}{30}\cdot \log{1000}=\frac{\log{10}}{10}\approx 0.23026$

Is this what you needed?