Express as an ordinary number. 3.85 x 10^-3

This is a scientific notation:

3.85 x 10^ (-3).

If you want to express it as an ordinary number:

3.85 x 10^ (-3) = 3.85 x 1 / 10^3 = 3.85 x 1/1,000 =

= 3.85 : 1,000 = 0.00385