
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
After conducting a market survey, it was found that the daily number of tourists $f(t)$ (in ten thousand) in a certain tourist city over the past month (considered as 30 days) and the time $t$ (in days) approximately satisfy the function relationship $$f(t)=4+ \frac {1}{t}$$, and the per capita consumption $g(t)$ (in yuan) and the time $t$ (in days) approximately satisfy the function relationship $g(t)=115-|t-15|$.  
(Ⅰ) Find the function relationship of the city's daily tourism revenue $w(t)$ (in ten thousand yuan) with time $t$ ($1≤t≤30，t∈N$);  
(Ⅱ) Find the minimum value of the city's daily tourism revenue (in ten thousand yuan).

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