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28 December, 18:03

How many times smaller is 2 * 10^-10 than 4 * 10^-9?

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  1. 28 December, 18:42
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    20

    Step-by-step explanation:

    (2*10^-10) : (4*10^-9)

    (2/4) * [ (10^-10) / (10^-9) ]

    (1/2) * (1/10)

    1/20

    The smaller value is 1/20 of the larger value ... which means it's 20 times smaller that the larger one
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