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What does 10^2 xx 10^5 means?...

What does `10^2 xx 10^5` means?

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`10^2 xx 10^5=10^2+5=10`, The product of `2^ id ` power and `5^ th ` power of 10 is a power of 10 . The exponent of 10 is the sum of the exponents of the factors, i.e., sum of 2 and 5 is 7
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