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A person struggles to read by holding a book at arm's length, a distance of 43 cm away. What power of reading glasses should be 

A person struggles to read by holding a book at arm's length, a distance of 43 cm away. What power of reading glasses should be prescribed for her, assuming they will be placed 2.0 cm from the eye and she wants to read at the "normal" near point of 25 cm ? Express your answer using two significant figures. p=

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