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Please help me to answer the following: How many times louder is a 60 dB sound than a 10 dB sound? How many times more

Please help me to answer the following:

How many times louder is a 60 dB sound than a 10 dB sound?
How many times more energy is released by a magnitude 5 earthquake than by a magnitude 3 earthquake?
If I am 2 meters away from the speakers at a concert, the sound levels is 140 db. How far away should I sit to reduce the level to 100 dB?

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