1 How many times louder is a 60 dB sound than a 20 dB sound

1. How many times louder is a 60 dB sound than a 20 dB sound?

2. How many times more energy is released by a magnitude 6 earthquake than by a magnitude 2 earthquake

3. When you are 2 meters away from the speakers at a concert, the sound level is 130 dB. How far away should you sit to reduce the level to 119 db?

1. three times

2.three times

3. when 2m the sound =130db

forxm=119db

i.e these are invesley each other

..2(130)=x(119)

i.e x=2(130)/119= 2.18meters