The cost of a particular pavement is given by:   b C T  aT , where C(T) is the cost per land-mile of paving, T is the thickness of paving applied (in inches), a is the cost of laying one inch of pavement over one line-mile, and b is an economies-of-scale parameter (b < 1 if there are economies of scale). The pavement deteriorates so that each 0.2-inch of paving extends roadway life for another year. If a = $500,000, b = 0.72, and the discount rate is 5%: 1) How thick should the pavement be laid

Power plants that rely on coal increase the amount of sulfur dioxide that dissolves into the air, eventually increasing the acidity of precipitation. the higher acidity of rain and snow can damage forests by making it more difficult for plants to absorb minerals from the soil. the equations below provide information about the market demand and supply of electricity. there is a constant marginal external cost of $25 per unit of electricity.d: qd= 200 – 2ps: qs=p – 10what quantity of electricity satisfies allocative efficiency in this market? a. 60b. 70c. 50d. 43.3