* Trillion: A trillion is 1 followed by 12 zeros (1,000,000,000,000).

* Scientific Notation: Scientific notation expresses a number as a product of a number between 1 and 10 and a power of 10.

Steps:

1. Move the decimal: Start with 50,000,000,000,000. Move the decimal point 13 places to the left (until it's between the 5 and 0). This gives you 5.0.

2. Exponent: Since you moved the decimal 13 places to the left, the exponent of 10 will be 13.

3. Write the number: 5.0 x 10¹³

Therefore, 50 trillion in scientific notation is 5.0 x 10¹³