Question

a certain drug is made from only two ingredients compound a and compound B there are 2 L of a compound a used for every 3 ml of compound be if a chemist wants to make 275 mL of the drug how many milliliters of a compound a are needed

Answer 1

`110mL`

Step-by-step explanation

We have that for every 2 mL of Compound A, 3 mL of Compound B is used.

This means that the ratio of Compound A to Compound B is:

`2\colon3`

The Chemist wants to make 275 mL of the drug.

To find out how much of Compound A must be used, we have to divide the ratio for Compound A by the total ratio and multiply by 275 mL.

The total ratio is:

`\begin{gathered} 2+3 \\ \Rightarrow5 \end{gathered}`

Therefore, the amount of Compound A to be used is:

`\begin{gathered} (2)/(5)\cdot275 \\ \Rightarrow110mL \end{gathered}`

That is the answer.