Thanks ehild! I just went over your examples again and again and I think I can do it now! Your way of thinking was different from what i was trying and it helped.
@jobrag- I need to know how to convert without a calculator, but thanks anyway!
For some reason I can't seem to be able to convert units without getting all mixed up. I can convert feet to inches to cm fine, but I can't convert units in a more complicated problem; for example, converting ft/sec to km/hour. I just get really mixed up and lose track of the numbers.
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