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What is the decibel level of a sound that is 20 times as intense as a 60 dB sound? Can you please show how (B)

What is the decibel level of a sound that is 20 times as intense as a 60 dB sound?

Can you please show how (B) is the correct answer. Thank You!

A. 80 dB

B. 73 dB

C. 120 dB

D. 62 dB

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