To convert miles to kilometers, the conversion factor commonly used is 1 mile = 1.60934 kilometers. Based on the options you provided, the following errors apply to Dean's work:
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Dean should have kilometers in the denominator of the conversion factor. - This is an error because in the conversion process, you should set up the conversion factor correctly so that the units of miles cancel out, leaving you with kilometers.
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He has the wrong units in his answer. - If Dean did not arrive at a result expressed in kilometers after conversion, then this would also be a mistake.
If it relates to the way he structured the conversion, he may also have improperly used the conversion factor without considering proper setup, but the first two points directly indicate the common errors in unit conversions.
Thus, the two correct responses regarding Dean's errors are:
- Dean should have kilometers in the denominator of the conversion factor.
- He has the wrong units in his answer.