Michael B. answered • 04/18/13
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(2*10^4)x(4*10^5) is the exact same as
(2*4)*(10^4*10^5) due to the associative property
Obviously 2*4 = 8
When multiplying exponents you add them so...
10^4*10^5 = 10^(5+4) = 10^9
Your answer is then simply 8*10^9 and in the form your question is asking for
it will be 8 with 9 zeros, I'm adding the spaces for visual clarity
8 000 000 000
In numeric terms its 8 billion.
Apologies for the block of text, the website appears to be having an issue right now and won't display the answer as typed out.
