Why does activity monitor use a lot of memory?

Hi,
Is there anyone else experiancing this issue in Mountain Lion or iMac in general?
Mohegan

mohegan wrote:
Hello BD,
Varies. Right now the %CPU is always changing, from 1.2 to as much as 63.0 with real memory of 24.0 especially when opening up iTunes or even iPhoto.
-Mohegan
So not much then.
Quite normal.

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