A gas station charges $1.55 per gallon for regular gasoline. Write an expression for the cost c(g) as a function of the number of gallons g and use this function to determine c(12). Match your results to the correct answer below.
A) c(g) = 1.55g ; c(12) = $20.15
B)
; c(12) = $18.60
C) c(g) = 1.55 + g ; c(12) = $13.55
D) c(g) = 1.55g ; c(12) = $18.60

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