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8 May, 15:19

Yara multiplies and divides a certain number by the same power of 10. The product she gets is 40,000 and the quotient she gets is 0.000004. Find yara's Number and the power of 10 she used. Explain your reasoning

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  1. 8 May, 17:33
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    40,000 = 4 * 10^4

    0.000004 = 4 * 10^-6

    The power of 10 exactly in between 4 and - 6 is - 1.

    She started with 4 * 10^ (-1) which is 0.4.

    0.4 * 100,000 = 40,000

    0.4/100,000 = 0.000004

    The number she started with is 0.4.

    The power is 10^5.
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