We re-reviewed Unitary Rates, which we've gone over many times.
Quantities are combinations of numbers and units. You have to have a combination of numbers and units because they don't make sense without each other. It'd be like saying, "This costs 457.09" or "I ate 9" (assuming, of course, that you aren't 7. HARHARHHAR MATH JOKE)
The Systeme Internationale, or the SI, is a French system using powers of 10. We call this system the Scientific Notation system (covered in the last post).
A handy unit conversion chart :
http://www.austinpowder.com/BlastersGuide/blasterstools/_graphics/table-unit-conversion.gif
- Esther
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