Question: A construction worker leaves an 8 5 dB environment after 2 hours and works in a 9 4 dB environment for 2 hours and then

A construction worker leaves an 85 dB environment after 2 hours and works in a 94 dB environment for 2 hours and then works in an 89 dB environment for another4 hours. What are the (a) dose and (b) time weighted average?

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