At what rate does the jet airplane in Problem 4 radiate energy in the form of sound waves?

Data from in Problem 4

The intensity of the sound wave from a jet airplane as it is taking off is 100 W/m² at a distance of 5.0 m. What is the intensity of the sound wave that reaches the ears of a person standing at a distance of 120 m from the runway? Assume that the sound wave radiates from the airplane equally in all directions.

The intensity of the sound wave from a jet airplane as it is taking off is 100 W/m² at a distance of 5.0 m. What is the intensity of the sound wave that reaches the ears of a person standing at a distance of 120 m