There are 8 fluid ounces in 1 cup. You can solve this problem using these proportions:
[tex] \frac{8}{1} = \frac{144}{x} [/tex]
It states that there are 8 fluid ounces in every 1 cup and 144 fluid ounces in every x cups. We have to solve for x using cross-multiplication:
[tex]8x = 144 \\ x=18[/tex]
Vickie can fill 18 1 cup candle molds with 144 fluid ounces of scented candle wax.