im in honors comupter science and one of my questions is evaluate 18% 7 does anyone know how to answer that

The north and south regions had very diferent economies in the 1800s.

What engine component is shown in the above figure?

Which of the following tasks is an audio technician most likely to perform while working on a nature documentary? (select all that apply). eliminating potentially distracting background noise adding sound effects making sure the lighting is adequate for a particular scene changing the narration to better match the mood of the documentary