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    Significant Figures - Scientific Notation

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    Need to calculate the average of the following two figures, and be sure to keep significant figures.

    19.5 + 20.40 = 39.9

    39.9 /2 = 19.95

    If the answer is 19.95, what is the answer using significant figures only?

    Can the answer containing significant figures be put into scientific notation?

    © BrainMass Inc. brainmass.com October 9, 2019, 4:10 pm ad1c9bdddf
    https://brainmass.com/chemistry/general-chemistry/significant-figures-scientific-notation-24469

    Solution Preview

    19.5 ==> 3 significant figures

    20.40 ==> 4 significant figures

    19.5 + 20.40 = (3 significant figures) = 39.9

    39.9 ==> 3 significant figures

    [ 39.9/2 ] =(3 significant figures) = 20.0 ==> the ...

    Solution Summary

    The answer is given step-by-step with explanation. The scientific notation significant figures are determined.

    $2.19