
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
At the start of her hike, Jenna can walk at a speed of 25 miles per hour. As she gets exhausted, her speed drops to 10 miles per hour. If she hikes a total of 140 miles in a total time of 8 hours, for how many hours was Jenna walking at her initial speed of 25 miles per hour? Express your answer as a common fraction.

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