How do you write 26.5 billion in scientific notation?

Answer 1

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

1 billion = (10^6)^2 = 10^12

→ 26.5 billion = 26.5 × 10^12 = 2.65 × 10^13

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

1 billion = (10^3)^(2+1) = 10^9

→ 26.5 billion = 26.5 × 10^9 = 2.65 × 10^10