3.76nm=0.000376mm. This is written in scientific notation as 3.76 x 10^-5.

Question

Why is it 10^-5 instead of 10^-6 (As nanometers is 10^-9 and millimeters is 10^-3?)

Answer 1

First problem is 3.76nm ≠ 0.000376mm = 3.76x10^-4 mm≠3.76x10^-5 mm

3.76nm = 0.00000376mm or 3.76x10^-6 mm

Your analysis is correct, but the original statements in the problem are both false.