Question

The sound intensity of a typical vacuum cleaner is 80 dB (decibels). Sound intensity of 160 dB will burst an eardrum. How many times louder is the sound that will burst an eardrum than the sound of a vacuum cleaner?
-Four hundred times as loud.
-Ten thousand times as loud.
-Forty thousand times as loud.

Answer 1

Why isn't the answer twice as loud? 80*2=160... :/

Answer 2

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Answer 3

Not sure which subject this is, but I'm guessing it's Biology?

Answer 4

Or physics?

Answer 5

Well whatever subject it is, here are some of the links to the other subjects :P

For Biology: http://www.openstudy.com/study#/groups/Biology
For Physics: http://www.openstudy.com/study#/groups/Physics
For Chemistry: http://www.openstudy.com/study#/groups/Chemistry

Answer 6

oops sorry

Answer 7

It's ok, everyone makes mistakes :)