The operation of this problem is B multiplication
Answer:
The Accurate and Correct Answer is 50,000nm Or option A.
Step-by-step explanation:
Given:
The sheet is 0.00005m thick
The conversion factor from meters to nanometers:

The thickness of the sheet of paper in nanometers can be found by multiplying the given measurement in meters with the conversion factor;

Hence, the measurement of the sheet in nm is 50 000nm
Answered By: 
Answer: 0.238853503185
(I obviously used a calculator.)
If you rounded this answer, it would be 0.24. Hope this helps!
7.2 because you just add the -4.8 to cancel out the -4.8 on the right side. and you get 7.2