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January 25, 2015

January 25, 2015

Posted by **Jenifer** on Sunday, November 6, 2011 at 10:01am.

- algebra -
**PsyDAG**, Sunday, November 6, 2011 at 11:59amOnline "*" is used to indicate multiplication, because "x" is often confused with meaning an unknown.

(5*10^4)(9*10^4) = 45*10^8

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