A dental hygienist uses a small concave mirror to look at the back of a patient's tooth. If the mirror is 1.82 cm from the tooth and the magnification is 2.10, what is the mirror's focal length? (Include the sign of the value in your answer.)(cm)
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A dental hygienist uses a small concave mirror to look at the back of a patient's tooth. If the mirror is 1.82 cm from the tooth and the magnification is 2.10, what is the mirror's focal length? (Include the sign of the value in your answer.)(cm)
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