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Significant figures question?

Science & Mathematics by Anonymous 2018-06-22 23:01:38

Social Science

Significant figures question?

2 answers

1.22 * 10^5 + 3.655 * 10^5 = 488000 I arrived at 487500 which is of course incorrect. How do you arrive at the correct answer? Thank you.

  • Anonymous

    1.22 * 10^5 + 3.655 * 10^5 = 487500

  • Anonymous

    The 122000 could be anything from 121500 to 122499, so it's not appropriate to suppose that the digit in the hundreds place can be reported meaningfully. That's why you must round off to the nearest thousand.

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