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To convert ounces (oz) to milliliters (mL), multiply the number of ounces by:

  1. 10

  2. 20

  3. 30

  4. 40

The correct answer is: 30

To convert ounces (oz) to milliliters (mL), the correct conversion factor is that one ounce is approximately equal to 29.57 milliliters. When rounding for practical purposes, many people use 30 mL as a simple conversion factor for calculation ease. Therefore, multiplying the number of ounces by 30 provides a straightforward way to estimate the volume in milliliters. This understanding is crucial in fields such as home health care, where accurate dosages of medication are often measured in mL. Knowing how to convert ounces to milliliters can help caregivers ensure that they administer the correct amounts of liquid medications, nutrition, or other fluids as prescribed by healthcare professionals.