Twinkies on the shelf of a convenience store lose their fresh tastiness over time. We say that the taste quality...

Twinkies on the shelf of a convenience store lose their fresh tastiness over time. We say that the taste quality is 11 when the Twinkies are first put on the shelf at the store, and that the quality of tastiness declines according to the function Q(t)=.85tQ(t)=.85t (tt in days). Determine when the taste quality will be one half of its original value.

The taste quality will be one half its original value after [removed] days.