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23 May, 09:30

Whats 7x10 to the - 8 power + 2 x 10 to the - 8 power

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  1. 23 May, 10:14
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    9x10 to the - 8th power.

    Since the numbers are both x10^-8, you can simply add 2 and 7. If you would rather look at it as:

    0.00000007 + 0.00000002 = 0.00000009 = 10x10^-8

    then you will get the same answer.
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