Answer:
The answer is 1266.67 mmHg
Step-by-step explanation:
In order to find the new pressure we use the formula for Boyle's law which is

where
P1 is the initial pressure
P2 is the final pressure
V1 is the initial volume
V2 is the final volume
Since we are finding the new pressure

So we have

We have the final answer as
1266.67 mmHg
Hope this helps you