<u>Answer:</u> The correct answer is 3500 miliseconds.
<u>Explanation:</u>
We are given a quantity of 3.5 seconds and we need to convert it into miliseconds.
To convert it into miliseconds, we will use the conversion factor:
1 second = 1000 miliseconds
Now, converting 3.5 seconds into miliseconds:
3,5 seconds = 3.5 × 1000 = 3500 miliseconds
Hence, the correct answer is 3500 miliseconds.