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July 26, 2014

July 26, 2014

Posted by **Tina** on Friday, January 29, 2010 at 8:11am.

4x10^9/2x10^-7

- college algebra -
**Dr Russ**, Friday, January 29, 2010 at 8:16am4x10^9/2x10^-7

divide top and bottom by 2 to give

2x10^9/1x10^-7

then subtract the powers of ten as it is a division

9--7=16

so the answer is

2 x 10^16

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