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* In those countries that use the long scale (based on powers of a million) like Europe:

1.2 bn = 1.2 x (10^6)^2 = 1.2 x 10^12

* In those countries that use the short scale (based on powers of a thousand plus one) like USA:

1.2 bn = 1.2 x (10^3)^(2+1) = 1.2 x (10^3)^3 = 1.2 x 10^9

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Q: What is 1.2 billion in exponential notation?
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