Understanding the Net Force on a Snorkeler's Eardrum

guyvsdcsniper
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Homework Statement
What is the net force on the ocean snorkeler of Question 1 if the pressure inside her ear is 1.0 atm (=101.3 kPa)? An adult's eardrum has a typical diameter of 8.0 mm
Relevant Equations
P=F/A
Can someone help me understand what I did wrong when solving this problem?
Screen Shot 2021-04-18 at 11.38.39 AM.png


Screen Shot 2021-04-18 at 11.40.30 AM.png
 
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You found the force on the eardrum due to the pressure inside the ear. Is there also a force due to pressure outside the ear?
 

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