Destructive Interference of a Sound Wave

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Destructive interference occurs when two sound waves of different intensities combine, resulting in a reduction of the overall intensity. In this case, a sound wave with an intensity of 25 mW/m^2 interferes destructively with another wave of 28 mW/m^2. The intensity of the superposition can be calculated by subtracting the lower intensity from the higher intensity, leading to a resultant intensity of 3 mW/m^2. Understanding the principle of superposition is crucial for solving problems related to wave interference. The final intensity reflects the net effect of the two waves interacting.
Ike
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A sound wave with intensity 25 mW/m^2 interferes destructively with a sound wave with intensity 28 mW/m^2. What is the intensity of the superposition of the two?

I've read through this section in my textbook three times now and I still have no clue as to how to go about figuring this out. Can you help me?
 
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What do you know about destructive interference? What happens between the two waves?
 

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