We’re being asked to (a) convert 100 µm and (b) 149,600,000 km to m.
Metric Prefixes are “labels” that can be placed in front of base units. Whenever using the metric prefix chart, remember that “1” is associated with the metric prefix.
The average thickness of a human hair is about 100 microns (m).
The distance between the Earth and the Sun is 149,600,000 km.
Convert the measurement to an SI unit.