## anonymous 3 years ago Log

1. anonymous

Formula is $\huge M=\log \frac{ I }{ I _{0} }$

2. anonymous

richter scale is log base 10 so compute $\frac{10^{8.3}}{10^{7.6}}=10^{8.3-7.6}=10^.7$ then use a calculator

3. anonymous

for number 6. which formula form the ones listed do i need @satellite73

4. anonymous

i am not sure what you are asking it is really just a matter of subtracting, then taking ten to that power

5. anonymous

So no formulas are involved ? like i'm talking about the formulas at the top of the page