Estimate the cost of electricity delivered to the customer

Most electrical energy in the United States is generated in large-scale power cycles

through conversion of thermal energy to mechanical energy, which is then converted

to electrical energy. Assume a thermal efficiency of 0.35 for conversion of thermal to

mechanical energy, and an efficiency of 0.95 for conversion of mechanical to electrical energy. Line losses in the distribution system amount to 20%. If the cost of fuel

for the power cycle is $4.00 GJ−1, estimate the cost of electricity delivered to the customer in $ per kWh. Ignore operating costs, profits, and taxes. Compare this number

with that found on a typical electric bill.