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.
1 The national average price of gas in September was $2.34 per gallon, which was the lowest monthly average since February 2015. 2  By comparison, the average price of gas in September 2014 was $3.39 per gallon.his is the first time that three states have had averages below $2 since February. The national average price for regular unleaded gasoline has fallen for 28 consecutive days, reaching todayâs price of $2.33 per gallon.