(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Solve the compound interest formula for r by using natural logarithms.

2. Relevant equations

A=P(1+r/n)^{nt}

3. The attempt at a solution

1400 = 1000(1+r/360)^{(360*2)}

1.4 = (1+r/360)^{720}

ln(1.4) = 720ln((360+r)/360)

I'm not sure where to go after this. Did I make a mistake?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Compound Interest Formula and Natural Logarithms

**Physics Forums | Science Articles, Homework Help, Discussion**