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Originally Posted by DonRotolo
Are you saying that there's more than 4 significant digits in the 'best' answer?
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No. But I am saying using
only 2 digits (11 volts), as suggested, is not a correct answer.
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Me too, because I'm not sure in which way you find flaw.
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More detail posted
here.
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The statement I use is "Just because your calculator shows 8 digits doesn't mean they are all important"
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Agreed. But a student should learn how to use the calculator in such a way that all those digits get used through the intermediate calculations.
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On the other hand, it is very important to know just how many digits you really have to work with, and a good idea of physical reality to check for reasonableness.
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I agree completely.