An engineer on the ground is looking at the top of a building. The angle of elevation to the top of the building is 22°. The eng
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As a practical equation, this one doesn't make much sense -- why would the profit per person have a term proportional to the number of people? Let's just go with it.
That's the answer to the first part.
35/x represents a portion of the profit that's 35/x per person, or a constant $35 per tour.