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The owner of a van installs a rear-window lens that has a focal length of -0.350...

The owner of a van installs a rear-window lens that has a focal length of -0.350 m. When the owner looks out through the lens at an object located directly behind the van, the object appears to be 0.230 m from the back of the van, and appears to be 0.310 m tall. (a) How far from the van is the object actually located, and (b) how tall is the object?

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