The number of stars in the milky way galaxy have an approximate it to be between 200 billion and 400 billion write these numbers in scientific notation

2 x 10^11 and 4 x 10^11

Step-by-step explanation:

We use scientific notation because it makes it easy to calculate things on very large and very small scales.

1 billion = 10^9

So 200 billion = 200 x 10^9

But we want that starting number to be between 1 and 10.

200 x 10^9 = 2 x 100 x 10^9 = 2 x 10^2 x 10^9 = 2 x 10^11

400 billion has the same number of zeros as 200 billion sooo

400 billion = 4 x 10^11