
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
A particle is projected vertically upward with a different initial velocity and reaches, at the end of $t$ seconds, an elevation of $s$ feet where $s = 200t - 20t^2$. What is the highest elevation reached?
A) 1000 feet
B) 900 feet
C) 500 feet
D) 400 feet
E) 300 feet

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