Question

Log

Answer 1

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

Answer 2

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

Answer 3

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

Answer 4

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

Answer 5

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