please help me! A jet plane at take-off can produce sound of intensity 9.10 W/m2

Question

please help me!

A jet plane at take-off can produce sound of intensity 9.10 W/m2 at 30.6m away. But you prefer the tranquil sound of normal conversation, which is 1.0 muW/m2. Assume that the plane behaves like a point source of sound. What is the closest distance you should live from the airport runway to preserve your peace of mind? Express your answer using two significant figures. What intensity from the jet does your friend experience if she lives twice as far from the runway as you do? Express your answer using two significant figures. What power of sound does the jet produce at take-off? Express your answer using two significant figures.

Explanation / Answer

a) 30.6*sqrt(9.1/1*10^-6)

=0.09230859114 m

b) 1*(1/2^2) =0.25 uw/m2

c)p = 4*3.14*d^2*l

= 4*3.14* 30.6^2*9.1

=107022.20256

=

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