Question

Helpppp pleaseeeee :(

Answer 1

`\large {\mbox{R = 3.6}}`

Explanation:

The formula for finding a magnitude of an earthquake on the Richter Scale is given as

`R = \log\left((A)/(A_0)\right)\\`

`\rm{where}\\\textrm{A - measure of amplitude of quake wave}\\\textrm{$A_0$ = amplitude of smallest detectable wave}\\`

Given A = 0.3954 and A₀ = 0.0001, we can plug in these values into the R equation to get

`R = \log\left((0.3954)/(0.0001)\right)\\\\= \log(3954)\\\\= 3.597\\\\= 3.6\text { rounded to the nearest tenth}`