1. How many times louder is a 60 dB sound than a 10 dB sound?( show your formula and steps for this problem)
2. How many times more energy is released by magnitude 5 earthquakes than by a magnitude 3 earthquake? (show your formula and steps to the solution of this mathematical question)
When you are 2 meters away from the speakers at a concert, the sound level is 140 db. How far away should you sit to reduce the level to 100 dB? (show your formula and steps to the solution of this problem)