Asked by waves

Expensive amplifier A is rated at 210W , while the more modest amplifier B is rated at 45W .
Estimate the sound level in decibels you would expect at a point 9.0m from a loudspeaker connected in turn to each amp.

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Answered by Elena
http://answers.yahoo.com/question/index?qid=20090617182342AAVRQWx
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