Question

You are making a colorful cake for a birthday party and need to use 3 drops of food coloring for every 7ounces of icing. How many drops of food coloring do you need if you are using 42 ounces of icing?

Answer 1

18 drops of food coloring

Step-by-step explanation:

The ratio of drops of food coloring and ounces of icing is constant, so we can write the following equation

`\frac{\text{drops}}{\text{ounces}}=(3)/(7)=(x)/(42)`

Where x is the number of drops that you need for 42 ounces of icing. So, solving for x, we get:

`\begin{gathered} (3)/(7)\cdot42=(x)/(42)\cdot42 \\ 18=x \end{gathered}`

Therefore, the answer is 18 drops of food coloring.