Hailey just had lunch at the sushi palace, and she wants to leave an 18% tip. she writes the expression b + 0.18b to compute her bill with a tip, where b is her bill before the tip.

which expression is equivalent to hailey's expression?
a) 1.18b
b) 0.18(2b)
c) 1.18(2b)
d) 2(1.18b)