Posted by Jamie on Wednesday, June 8, 2011 at 10:26am.
Sorry, we don't do drawings, including ray diagrams, here. Your textbook should explain how it is done. If not there are plenty of web sites that do.
For the location of the image, Di, you can always use the equation
1/Do + 1/Di = 1/f,
with
Do = 30 and f = 8
The image should be real and inverted in this case
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