What is 1.2 billion in exponential notation?

Answer 1

* 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