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Title: Tan's face is 20 cm in front of a concave shaving mirror. If he observes his image to be twice as ... Post by: Chery on Dec 5, 2016 Tan's face is 20 cm in front of a concave shaving mirror. If he observes his image to be twice as big and upright, what is the focal length of the mirror?
A) 10 cm B) -40 cm C) -50 cm D) 40 cm E) 50 cm Title: Re: Tan's face is 20 cm in front of a concave shaving mirror. If he observes his image to be twice ... Post by: noreyaga on Dec 5, 2016 Content hidden
Title: Re: Tan's face is 20 cm in front of a concave shaving mirror. If he observes his image to be twice as ... Post by: Chery on Jan 13, 2017 Looked all over the internet for this, thank you for answering correctly
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