Try the given examples or type in your own problem and check your answer with the step-by-step explanations. Where A is the amplitude in mm measured by the Seismograph and B is a distance correction factor. If you have a single logarithm on each side of the equation having the same base then you can set the Solving Logarithmic Equations Read More.
Loudness in dB 10 log 10 p 10 12 where p is the sound pressure.
If we want to grow 30x we can wait ln30 all at once or simply wait ln3 to triple then wait ln10 to grow 10x again. Now some algebra to solve for k. 2k ln 6 Divide by 2. The net effect is the same so the net time should be the same too and it is.