Formula- R=log(A/A0)

Question

An earthquake monitoring station measured the amplitude of the waves during a recent tremor. The waves were 10,000 times as large as A₀, the smallest detectable wave. How high did this earthquake measure on the Richter scale? 

Answer 1

From the wording of the question,

 

A = 10000A₀,

 

so

 

A/A₀ = 10000.

 

Plug that into your formula.  You should be able to finish from here.