Answer:
The most efficient way to do this is to use the acronym KHDBDCM
(kilo, hecto, deca, base unit, deci, centi and milli ) by doing so you will use mg (milligram ) to kg(kilogram) which is 6 decimal places to the left. The answer would be .00000518 kg = 5.18 x 10 -6 mg
Explanation:
