Answer :
Final answer:
To convert 197 micrometers to kilometers, divide the number of micrometers by 1 billion, since there are 1,000,000,000 micrometers in a kilometer, resulting in 0.000000197 km.
Explanation:
To convert 197 micrometers (μm) to kilometers (km), you need to know the conversion factors between these units.
There are 1,000,000 micrometers in a meter, and 1,000 meters in a kilometer, which means there must be 1,000×1,000,000 micrometers in a kilometer, equating to 1,000,000,000 micrometers in a kilometer.
We can set up the conversion as follows: 197 μm × (1 m / 1,000,000 μm) × (1 km / 1,000 m). Doing the math gives us 197/1,000,000,000 km, which simplifies to 0.000000197 km. So, the correct result is C. 0.000000197 km.
