The length of the Mississippi River is approximately 2,320 miles (3,730 km), slightly shorter than the Missouri River. The Mississippi and Missouri Rivers combine to form the longest river system in the USA and North America. It is also the fourth longest in the world.
The national average price for regular unleaded gasoline sits at $2.16 per gallon, which is the lowest mark since April and the lowest price for this date since 2004. Todayâs price is five cents less than one week ago, 15 cents less than one month ago, and 56 cents less than the same date last year.
Comparison to Other Technology Costs. According to the EIA, the levelized cost of an advanced natural gas-fired combined cycle plant is 6.3 cents per kilowatt hour and that of an advanced coal-fired plant and nuclear plant are each 11.1 cents per kilowatt hour.hus, the total cost for wind power, including the hidden costs, averages 15.1 cents per kilowatt hour for natural-gas fired back-up and 19.2 cents per kilowatt-hour for coal-fired back-up.