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No, scale=10 means that the output is formatted with 10 digits after the decimal point.

Excerpt from the manpage of bc:
scale ( expression ) The value of the scale function is the number of...

If you use top in batch mode you get a list of all processes:
top -b -n 1 > list_of_processes

Before that, if you want the output sorted by memory usage you can do the following:
top
M (this...