Answer:
Thickness of gold foil will be 

Explanation:
We have given that a sheet of gold foll is 0.28 millionth of a meter thick 
We know that 1 million = 1000000
We have to find the thickness of the gold foil in scientific notation 
The gold foil is 0.28 millionth of a meter
So the thickness of the gold gold foil is 
