Answer:
[tex]4\times10^{12}[/tex]Explanation:
Here, we want to write 4 trillion in scientific notation
What this means is that we want to write it in the power of 10 (A trillion is 12 zeros)
Mathematically, we have this as:
[tex]4\text{ trillion }=\text{ 4}\times10^{12}[/tex]