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    (Original post by Btec certified)
    How many significant figures or decimal places are we meant to use?
    as many as the question uses, is what I've been taught! If the question gives you 6.63 you answer with 3 sig figs, if it's 6.6 you answer with 2 etc

    safe bet is to write out the full answer and then simplify
 
 
 
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