Will give brainliest and 20 points!

Your answer would be the first on because when you set up your equation you can find 4 by dividing 42,980 by 10 4 times wich will give you 10^4 when you divide exponents you subtract so iwill look like this

5x10^6
= 1.25x10^2 
4x10^4

I'm gonna have to say about 13 percent

The first answer is correct