The source of a sound wave has a power of 3.00` muW`. If it is a point source, (a) what is the intensity 4.20 m away and (b) what is the sound level in decibels at that distance?

Explanation

To solve the problem step by step, we will calculate the intensity of the sound wave at a distance of 4.20 m from the point source and then determine the sound level in decibels.

### Step 1: Understand the formula for intensity
The intensity \( I \) of a sound wave from a point source is defined as the power \( P \) of the source divided by the area \( A \) over which the power is distributed. For a point source, the area is the surface area of a sphere, which is given by:
\[ A = 4\pi r^2 \]
where \( r \) is the distance from the source.
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