Question

A certain drug is made from only two ingredients: compound A and compound B. There are 5 milliliters of compound A used for every 7 milliliters of compound B. If a chemist wants to make 1056 milliliters of the drug, how many milliliters of compound A are needed?what is the answer?

Answer 1

If the proportion of compounds A and B is 5 to 7, we can calculate the amount of each compound in the total of 1056 using the equations:

`\begin{gathered} A=(5)/(5+7)\cdot1056 \\ A=(5)/(12)\cdot1056 \\ A=440 \\ \\ B=(7)/(5+7)\cdot1056 \\ B=(7)/(12)\cdot1056 \\ B=616 \end{gathered}`

So the amount of compound A needed is 440 ml.