Question

a certain drug is made from only two ingredients: compound a and compound b. there are 4 milliliters of compound a used for every 3 milliliters of compound b. if a chemist wants to make 371 milliliters of the drug, how many milliliters of compound b are needed?

Explanation:

Step1: Calculate the total parts in the ratio

The ratio of compound A to compound B is 4:3, so the total number of parts is $4 + 3=7$ parts.

Step2: Find the value of one - part

The total volume of the drug is 371 milliliters. If there are 7 parts in total, then one - part is $\frac{371}{7}=53$ milliliters.

Step3: Calculate the volume of compound B

Compound B is 3 parts. So the volume of compound B is $53\times3 = 159$ milliliters.

Answer:

159