Final answer:
4 x 10^6 is 400 times larger than 1 x 10^4.
Step-by-step explanation:
Scientific notation allows us to represent very large or very small numbers in a compact form. In scientific notation, a number is written as a product of a decimal number between 1 and 10, and a power of 10.
Given that 4 x 10^6 is in scientific notation, and 1 x 10^4 is also in scientific notation, we can compare them by dividing the two decimal numbers. Therefore, (4 x 10^6) / (1 x 10^4) = 4 x 10^(6-4) = 4 x 10^2 = 400.
Therefore, 4 x 10^6 is 400 times larger than 1 x 10^4.