How do you write 3 quadrillion in standard form?

Answer 1

quadrillion is a contraction of quad-million; to expand it into full, it depends upon where you are and which scale you are using.

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

3 quadrillion = 3 × (10^6)^4 = 3 × 10^24 = 3,000,000,000,000,000,000,000,000

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

3 quadrillion = 3 × (10^3)^(4+1) = 3 × 10^15 = 3,000,000,000,000,000