What is the scientific notation of one and a half trillion?

Answer 1

It is in scientific notation 1.5 × 10¹² = 1,500,000,000,000

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Tri-llion implies three-fold million; the actual value depends which scale you use:

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

1.5 trillion = 1.5 × (1,000,000)³ = 1.5 × (10⁶)³ = 1.5 × 10¹⁸

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

1.5 trillion = 1.5 × (1,000)⁽³⁺¹⁾ = 1.5 × (10³)⁴ = 1.5 × 10¹²