I have equation, just don't know where to fill in numbers. PLEASE HELP

An earthquake has an amplitude of 2465 micrometers and a period of 0.7 seconds. Find its measure on the Richter scale

Question

I have equation, just don't know where to fill in numbers. PLEASE HELP

An earthquake has an amplitude of 2465 micrometers and a period of 0.7 seconds. Find its measure on the Richter scale

anonymous · Answer

$$R=\log \frac{ A }{ P }$$

anonymous · Answer

i guess it is 
$$\log(\frac{2465}{.7})$$

anonymous · Answer

http://www.wolframalpha.com/input/?i=log%282465%2F.7%29&a=*FunClash.log-_*Log10-

anonymous · Answer

thank you!

anonymous · Answer

yw
make sure to click the one that says "common log"

anonymous · Answer

actually the link i sent does use the common log, so that is right