Question

The national debt of a country is

Answer 1

Answer:  $3 \times 10^{13}$

Explanation:

Highlight the first digit on the very left (2). The 7 right next to it means we'll round that 2 up to a 3. Every other digit becomes a zero.

The number 27,895,168,401,112 rounds to 30,000,000,000,000 which is the number 30 trillion.

It converts to the scientific notation $3 \times 10^{13}$ because we basically start with 3.0 and move the decimal point 13 spots to the right to arrive at 30 trillion as shown above.