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.
The chart indicates that if natural. gas cost less than $1.44 per therm, or. $1.30 per CCF, or if liquid propane. cost less than $1.21 per gallon, these. fuels will be cheaper to use than RFO. (No. 5 oil) when RFO rises above. $2.06 per gallon.