Answer:
103.01 dB
Explanation:
To add the sound level of two speakers, we need to use the following formula
[tex]10\log (10^{\frac{x}{10}}+10^{\frac{y}{10}})[/tex]Where x and y are the decibels of the speakers. So, replacing x and y by 100 dB, we get:
[tex]\begin{gathered} 10\log (10^{\frac{100}{10}}+10^{\frac{100}{10}}) \\ 10\log (10^{10}+10^{10}_{}) \\ 103.01 \end{gathered}[/tex]The sound level when both are on at the same time is 103.01 dB
