Answer:
is the greatest
2000 times greater
Explanation:
Given



Solving (a): The greatest of the numbers
First, we convert them to decimals:


By comparing the decimal numbers, the highest is: 0.0082.
Hence,
is the greatest
Solving (b): How many times greater than the smallest
In (a) above:
The greatest is:

By comparing the decimal numbers,
The smallest is: 0.0000041 i.e.

The number of times the greatest is greater than the smallest is:



Hence, it is 2000 times greater