The general ‘rule of thumb’ used by geologists is that a thirty-fold increase in energy or intensity of an earthquake is represented by an additive increase of x on the Richter scale. A thirty-fold increase in E can be represented by E × 30n where n ∈ N. In the Richter scale formula given above, find x.
One way to define the magnitude of an earthquake is to use the Richter scale formula given below:
M=0.67(0.37E) + 1.46 where M is the magnitude of the earthquake on the Richter scale
and E is the energy of the quake in kilowatt-hours. (1 kilowatt-hour = 3.6 × 106 Joules)

Question

The general ‘rule of thumb’ used by geologists is that a thirty-fold increase in energy or intensity of an earthquake is represented by an additive increase of x on the Richter scale.  A thirty-fold increase in E can be represented by E × 30n where n ∈ N.  In the Richter scale formula given above, find x. 
One way to define the magnitude of an earthquake is to use the Richter scale formula given below:  
M=0.67(0.37E) + 1.46 where M is the magnitude of the earthquake on the Richter scale 
        and E is the energy of the quake in kilowatt-hours.          (1 kilowatt-hour = 3.6 × 106 Joules)

anonymous · Answer

It says solve for x, but there's not an x in your equation