Question

last month, a coral reef grew 4,000,000 millimeters taller. how much did it grow in meters? be sure to include the correct unit in your answer.

Explanation:

Step1: Recall unit conversion factor

1 meter = 1000 millimeters, so $1\ \text{mm} = \frac{1}{1000}\ \text{m}$

Step2: Convert millimeters to meters

$4,000,000\ \text{mm} \times \frac{1\ \text{m}}{1000\ \text{mm}} = 4000\ \text{m}$

Answer:

4000 meters