Hello!
To get this into scientific notation, we must get a number between 0 and 10 multiplied by 10^x.
Since we have 10^12 we can just worry about 8.8(8). This gives us 70.4. 70.4(10^12) is not in scientific notation. To get 70.4 into scientific, we divide by 10. If we divide by 10, we have to add another power to the exponent to show that we can get it back up to 70.4 .
The answer is 70.4(10^13).
Hope this helped!