
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
During an earthquake, the epicenter emits both primary (P) waves and secondary (S) waves in all directions simultaneously. The propagation speeds are 5.94 km/s for P-waves and 3.87 km/s for S-waves. In a certain earthquake, a seismic monitoring station receives the P-wave first and then receives the S-wave 11.5 seconds later. What is the distance from the epicenter to the seismic monitoring station, in kilometers (round to the nearest integer)?

Present the answer in LaTex format: \boxed{Your answer}
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