Groupe air uses two measures of activity, flights and passengers, in the cost formulas in its budgets and performance reports. the cost formula for plane operating costs is $36,130 per month plus $2,036 per flight plus $1 per passenger. the company expected its activity in october to be 73 flights and 223 passengers, but the actual activity was 72 flights and 228 passengers. the actual cost for plane operating costs in october was $179,050. the activity variance for plane operating costs in october would be closest to:

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