(a) 1 serving of biscuits mix = 1/4 cup
1 box of biscuits mix = 72 servings
therefore the number of cups of biscuits mix in a box
[tex]\begin{gathered} \frac{1}{4}\times\text{ 72 = 18} \\ \text{The total number of cups of biscuits mix in a box = 18} \end{gathered}[/tex]
(b) The total number of biscuits that can be made using a cup of biscuits mix
= 18
According to the above table, the ratio of the number of biscuits to mix cup is 3
Therefore 18 x 3 = 54 biscuits
(c) The cost in dollars/cents per biscuits is
[tex]\begin{gathered} 54biscuits\text{ }\equiv\text{ \$6.48} \\ 1\text{ biscuit }\equiv\text{ }\frac{6.48}{54}\text{ (conversion of dollar to cent multiply \$1 by 100)} \\ =\text{ \$}\frac{648}{54} \\ =\text{ 12 cents} \end{gathered}[/tex]