For example, (x +1)*(x +1) is a term built from the constant 1, the variable x, and the binary function symbols + and *; it is part of the atomic formula (x +1)*(x +1) â¥ 0 which evaluates to true for each real-numbered value of x.
In recent weeks, the U.S. diesel fuel price has been hovering around $4.16 per gallon. LNG is selling for about $2.92 per diesel gallon equivalent, 30 percent less, according to Clean Energy Fuels' current price report, which is updated weekly.
âU.S. regular gasoline retail prices, which averaged $3.36 per gallon in 2014, [will] average $2.43 per gallon in 2015 and $2.63 per gallon in 2016,â said the EIA.