Answer :

To convert millimeters (mm) to centimeters (cm), we need to understand the relationship between these two units of measurement.

  1. Understanding the Conversion Factor:

    • 1 centimeter is equal to 10 millimeters.
    • This means 1 mm is equal to 0.1 cm.
  2. Calculating the Conversion:

    • To convert 84 mm to cm, you multiply 84 by the conversion factor of 0.1.
    • Using the formula:
      [tex]\text{Centimeters} = \text{Millimeters} \times 0.1[/tex]
    • Substitute 84 mm into the formula:
      [tex]\text{Centimeters} = 84 \times 0.1 = 8.4[/tex]

Therefore, 84 mm is equal to 8.4 cm.

  1. Choosing the Correct Answer:
    • From the options given, the correct answer is d. 8.4.