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23 August, 09:27

Scientist places 4 cells in a petri dish. Every hour, the cells divide in 2. How many cells are there after 9 hours?

Enter your answer rounded to the nearest whole number, such as: 425

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  1. 23 August, 09:54
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    2,048 cells

    Step-by-step explanation:

    Number of cells after 1 hour = 4 * 2 = 8

    Number of cells after 2 hours = 8 * 2 = 16

    Number of cells after 3 hours = 16 * 2 = 32

    Number of cells after 4 hours = 32 * 2 = 64

    Number of cells after 5 hours = 64 * 2 = 128

    Number of cells after 6 hours = 128 * 2 = 256

    Number of cells after 7 hours = 256 * 2 = 512

    Number of cells after 8 hours = 512 * 2 = 1,024

    Number of cells after 9 hours = 1,024 * 2 = 2,048
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