Questions: How many milliliters of Children's Advil (80 mg of ibuprofen per 4 mL) are needed to give a child a dose of 100 mg? Round your answer to the nearest mL. mL of Children's Advil are needed.

Solution Steps

Children's Advil contains 80 mg of ibuprofen per 4 mL. To find the concentration, we calculate the amount of ibuprofen per 1 mL:

\[ \text{Concentration} = \frac{80 \, \text{mg}}{4 \, \text{mL}} = 20 \, \text{mg/mL} \]

We need to determine how many milliliters are required to provide a 100 mg dose. Using the concentration calculated in Step 1, we set up the equation:

\[ \text{Volume} = \frac{100 \, \text{mg}}{20 \, \text{mg/mL}} = 5 \, \text{mL} \]

Final Answer