Answer:

Explanation:
From the question we are told that:
Pressure of 
Bottle cap area 
Generally the equation for Resultant pressure
is give as is mathematically given by

Where



Generally the equation for Force exerted by screw F is give as is mathematically given by


2NO2 means that there is 2 oxygen atoms and one nitrogen with two sets of that. So its the third one
1.5 / 0.5 = 3 I believe this is the right answer