write 0.000355 in scientific notation.

Explanation:

Step1: Move decimal point

Move the decimal point to get a number between 1 and 10. For 0.000355, we move it 4 places to the right to get 3.55.

Step2: Determine exponent

Since we moved the decimal point 4 places to the right, the exponent of 10 is - 4.

Answer:

$3.55\times10^{-4}$