Final answer:
To produce a demand of 400 pounds of tuna per month, the town's fishery should charge $9 per pound.
Step-by-step explanation:
To calculate the price that the town's fishery should charge for 400 pounds of tuna per month, we need to solve the demand function equation for p. Substituting q = 400 into the equation, we have:
p = 180/(400^0.5)
Calculating this expression gives us p ≈ 180/20 = 9 dollars per pound. Therefore, the town's fishery should charge $9 per pound of tuna to produce a demand of 400 pounds per month.