
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
Amerigo Vespucci has another map of an imaginary land placed on the complex plane. In this land, Moonbase Alpha is located at the origin, $0$ on the complex plane, and New Atlantis is located at $3000i$. A third city, Skyhaven, corresponds to the point $900 + 1200i$. Calculate the complex plane distance from Moonbase Alpha to Skyhaven.

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