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.
Answer:
The answer to your question is: 6 ft
Step-by-step explanation:
Data
height = ?
Volume = 509 ft³
radius = 9 ft
π = 3.14
Formula
V = (1/3) πr²h
Process
h = 3V / πr²
h = 3(509) / (3.14x9²) substitution
h = 1527 / 254.34 simplification
h = 6. ft