Suppose that there are only two fishermen,Zach and Jacob,who fish along a certain coast.They would each benefit if a lighthouse were built along the coast where they fish.The marginal cost of building each additional lighthouse is $150.The marginal benefit to Zach of each additional lighthouse is 90 - Q,and the marginal benefit to Jacob is 40 - Q,where Q equals the number of lighthouses.
What is the efficient number of lighthouses?

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The Answer of Suppose that there are only two fishermen,Zach and Jacob,who fish along a certain coast.They would each benefit if a lighthouse were built along the coast where they fish.The marginal cost of building each additional lighthouse is $150.The marginal benefit to Zach of each additional lighthouse is 90 - Q,and the marginal benefit to Jacob is 40 - Q,where Q equals the number of lighthouses.
What is the efficient number of lighthouses?

Suppose That There Are Only Two Fishermen,Zach and Jacob,who Fish