A jet plane at take-off can produce sound of intensity 9.20 W/m^2 at 30.2 m away. But you prefer the tranquil sound of normal conversation, which is 1.0 m0W/m^2. Assume that the plane behaves like a point source of sound.
Part A: What is the closest distance you should live from the airport runway to preserve your peace of mind? r=?km
Part B: What intensity from the jet does your friend experience if she lives twice as far from the runway as you do? I= ? m0W/m^2
Part C: What power of sound does the jet produce at take-off? P =? W