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A dentist uses a curved mirror to view the back side of teeth in the upper...

A dentist uses a curved mirror to view the back side of teeth in the upper jaw. Suppose she wants an upright image with a magnification of 1.5 when the mirror is 1.0 cm from a tooth.

Should she use a convex or a concave mirror?

She should use a convex mirror.
She should use a concave mirror.

What focal length should it have?

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