Circle the letter of the answear in which 503,000,000 is written correctly in scientific notation.(superscript -7, superscript 6,and superscript 8

1)5.03 x 10-7
2)503 x 106
3)5.03 x 108
4)503 million

I got number 3 for the answear.

And you get the prize.

5.03 x 10⁸ is correct.