Question

What is the value of x when the Richter scale rating is 3.8?

Answer 1

An earthquake with a rating of 3.8 can cause destruction in areas of up to 100 kilometers that are populated. 

R = log x 

R = rating of the earthquake's size on the Richter scale 

x = ratio of earthquake intensity to a minimum level of intensity

Answer 2

Log x = 3.8
x= 10^3.8
≈6309.57344