Final answer:
To write the length of the electronic component, 0.0001265 mm, in scientific notation, the scientific notation is 1.265 x 10^-4 mm.
Step-by-step explanation:
To write the length of the electronic component, 0.0001265 mm, in scientific notation, we need to move the decimal point to the right until there is only one non-zero digit to the left. The number of places we move the decimal point determines the exponent of 10. In this case, we move the decimal point six places to the right, so the scientific notation is 1.265 x 10-4 mm.