9 x 10^5) / (3 x 10)

To divide two numbers written in scientific notation, you subtract the exponents of the common base and divide the coefficients.

In this case, the common base is 10. So, we will subtract the exponents and divide the coefficients:

(9 x 10^5) / (3 x 10)
= (9/3) x (10^5/10)
= 3 x 10^4