Write 0.0000002005 in scientific notation

To write 0.0000002005 in scientific notation, follow these steps:

1. Move the decimal point in 0.0000002005 to the right until only one non-zero digit remains to the left of the decimal point. This gives 2.005.
2. Count the number of places the decimal point was moved. In this case, it was moved 7 places to the right.
3. Write the number as a product of the number found in step 1 and 10 raised to the negative of the number of places moved in step 2.

The answer is:

2.005 \times 10^{-7}