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Each resident is willing to pay $10 for each additional streetlight installed in...
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Each resident is willing to pay $10 for each additional streetlight installed in the neighborhood. There are 15 residents in the neighbourhood. The cost of installing streetlights is x2, where x is the number of streetlights. So the marginal cost of installing another streetlight is given by 2x. The efficient number of streetlights to be installed in this neighborhood is:
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