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Home Q & A Board Science-Related Homework Help Physics
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ppk ppk
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12 years ago
A person can read the newspaper when it is held at 60 cm from his eyes. What should the focal length of his contact lenses be to allow him to read the newspaper comfortably at a distance of 30 cm?
A) -30 cm
B) +30 cm
C) -60 cm
D) +60 cm
E) +90 cm
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bio_manbio_man
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12 years ago
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