We can find the scientific notarion of this number by, as first step, identifying the base.
In this case, it is 5.2.
Then, we divide the original number by the base:

Then, we find the equivalent of this result in exponents of 10.
As we have 8 zeros after the one, we can write the following equality:

Then, we can write the number as:

The scientific notation for this number is 5.2*10^8.