Answer
$1.3 \times 10^{12}$
Work Step by Step
1.3 trillion = $1,300,000,000,000$
To convert this into scientific notation, move the decimal point 12 places to the left to obtain 1.3, and then multiply by $10^{12}$ to retain the number's value.
$=1.3 \times 10^{12}$
