The answer is C, you use the formula x=-b/2a
6 cups of water : 4 cups of tomato sauce
1 cup: 4/6 tomato sauce
There are 2/3 cups of tomato sauce for every cup of water.
The volume of one box is 240 inches cubed, because 12x8x2.5=240. If we multiply this by 2, then the volume of two boxes of detergent is 480 inches cubed.
