Answer:
A. 6.282 * 10^3
Explanation:
In order to be written in scientific notation, it has to be between 1 and less than 10. Knowing this, we can eliminate both C and D, as the are well over 10. We now have A and B left, so you have to figure out how many places the decimal is from the end. It's three, so the correct answer is A; 6.282 * 10^3.
Hope this helps!