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So I am aware of the sig fig rules, but i am having trouble trying to figure out when to round and when to just do the cut off method. For example when i got an answer for a square root i got .000189737, and the answer was 1.89x10^-4. I was wondering if we put 1.90x10^-4 would be marked as wrong.
As mentioned above, don't round off until the final answer. Your answer would not be marked as wrong but maybe to be safe in parenthesis mention that number of sig figs you've rounded to. However, the general rule is round off to the lowest number of sig figs given in the question asked.
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