When doing unit conversions:

*• Put units you need to cancel out on opposite places (*i.e.* if it’s in the numerator then put the conversion factor with the same unit in the denominator)*

*• Always raise the units to the necessary number especially when dealing with volume, area, etc.*

To do so, we need the following ** conversion factor**:

**1 mi = 1.609 km**

At a particular instant in time the Earth is judged to be 92,955,000 miles from the sun. What is the distance in kilometers to four significant figures? (See back inside cover for conversion factor).

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Dimensional Analysis concept. You can view video lessons to learn Dimensional Analysis. Or if you need more Dimensional Analysis practice, you can also practice Dimensional Analysis practice problems.

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