How much do textbook solutions usually round?

  • Thread starter emyt
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  • #1
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this is just a small question, how much do textbook solutions usually round? I just did a question that came to an equation 4*10^6 - 1 * 10^4 / (0.01/0.5(4*10^6 - 1 * 10^4))
the calculator says like 796 000 500 000 000. something something and the textbook says that it should be 8.0 * 10^14.. well, it's close enough - but how can I ever know if it's just a rounding thing or my method was way off?

thanks
 

Answers and Replies

  • #2
tiny-tim
Science Advisor
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Hi emyt! :smile:

(try using the X2 tag just above the Reply box :wink:)

If it says 8.0, then it's rounding to 8.0 rather than 8.1 or 7.9 …

so it looks as if your 7.960005… is ok. :smile:
 

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