Doug says that 3000 kilometers is the same distance as 3 meters. what mistake did he make concerting 3 meters to kilometers

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:

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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