Answer:
They made the mistake of dividing by 1000 instead of .001. 3000km is actually 3,000,000m. Look at the equation below for a visual explanation.
Step-by-step explanation:
[tex]\frac{3000km}{1} X\frac{1m}{.001km} = 3,000,000m\\\frac{3000km}{1}X\frac{1m}{1000km} = 3m[/tex]