The diameter of an 18 mm dine when expressed in micrometers is; 18000 micrometers
We are given the diameter of dime at 18 mm.
Now, from conversion of units between mm(millimeter) and micrometer, we know that;
1 millimeter = 1000 micrometer.
Thus, by proportion, 18 millimeter will be;
18 millimeters × 1000 micrometers/1 millimeter
>> 18000 micrometers
In conclusion, the diameter of the 18mm fine in micrometers is; 18000 micrometers
Read more about conversion of units at; https://brainly.com/question/8421470
