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A 10.0 cm tall pencil stands balanced on its eraser, 25.0 cm in front of a...

A 10.0 cm tall pencil stands balanced on its eraser, 25.0 cm in front of a mirror with radius of curvature of 1.00 m. Where will the image form, and how tall will the image be, if a) the mirror is concave, and b) the mirror is convex?

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