In 2010, 433*10^6 tons of coal was produced from the stateof Wyoming.
A. If the average heat content of the coal is 8,600 Btu/lb, and a typical coal-fired power plant operates at 40% efficiency, how many kW-hr of electricity was produced in 2010 using this coal?
1 ton=2000lb and 2.931*10^(-4)kW-hr=1Btu
B. In 2010, 4.128*10^12kW-hr of electricity was produced in the united states. What percentage of the nations electricity is fueled by the state of Wyoming?