Answer: She should leave 8.5 inches of margin on the left so that the figure is centered.
Explanation:
Since we have given that
Width of figure = 13.09 inches
width of the page = 21.59 inches
We need to adjust it centered on the page.
For which we need to leave margin on the left so that the figure is centered.
So, Length of margin is given by

Hence, she should leave 8.5 inches of margin on the left so that the figure is centered.