- #1

kopinator

- 41

- 1

I= P/4πr^2

decibels(dB)= 10log(I/I0)

I0= 1.0x10^-12

I used the 2nd equation given to find the intensity of the sound at 75 db and then plugged that into the 1st equation given to find the power, P. Once I found P, i used the 2nd equation to find the intensity of the sound at 36 dB. I plugged in that number into the 1st equation and solved for r. I feel like I need to involve the frequency to find the answer but I don't know how.