Answer:
x=2
Step-by-step explanation:
x^5 * x^-3 =x^n
We know a^b * a^c = a^(b+c)
x^(5 -3) =x^n
x^2 = x^n
2=n
I think the answer is x but I don't know I hope you get it right the answer should be d good luck
we can use
sound level formula
![\beta=10log(\frac{I}{I_0} )dB](https://tex.z-dn.net/?f=%5Cbeta%3D10log%28%5Cfrac%7BI%7D%7BI_0%7D%20%29dB)
where
is the sound level for a noise
I is intensity given
I0 is reference intensity
we know that reference intensity as
![I_0=1*10^{-12}W/m^2](https://tex.z-dn.net/?f=I_0%3D1%2A10%5E%7B-12%7DW%2Fm%5E2)
we are given
![I=9.9*10^{-5}W/m^2](https://tex.z-dn.net/?f=I%3D9.9%2A10%5E%7B-5%7DW%2Fm%5E2)
now, we can plug these values
and we get
![\beta=10log(\frac{9.9*10^{-5}W/m^2}{1*10^{-12}W/m^2} )dB](https://tex.z-dn.net/?f=%5Cbeta%3D10log%28%5Cfrac%7B9.9%2A10%5E%7B-5%7DW%2Fm%5E2%7D%7B1%2A10%5E%7B-12%7DW%2Fm%5E2%7D%20%29dB)
now, we can simplify it
![\beta=10log(9.9*10^{-5+12} )dB](https://tex.z-dn.net/?f=%5Cbeta%3D10log%289.9%2A10%5E%7B-5%2B12%7D%20%29dB)
................Answer
The solution is where the 2 lines intersect.
(-1,1)
I believe x=16 is the answer.