The answer is the third option, -7.
Hope this helps.
480 bottles because 300 divided by 5 is 60 so then you multiply 60 by 8 and you get 480!
Segment DF is 1/2 the length of Segment DE. Since the entire segment is DE and it's midpoint is at F, the segment would be broken into 2 equal segments in one. Segment DF and FE. Segment DF is congruent to Segment FE.