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学生情况：
An object is placed at a distance of 400 feet from a lens of focal length 20 feet. Julia is trying to find the image of the object. Please help Julia calculate the distance between the lens and the image, and plot the ray diagram.
Tutor Case:
David Zhao
Education Background: Mr. Zhao holds a Bachelor's degree in Mathematics from the University of Waterloo and a Master's degree in physics from Imperial College London. He has many years of experience in tutoring physics. He is good at guiding students to draw lessons from one example to another.
媒体报道
On December 19, 2020, New York time, UniverseBeyond and Sodask will light up the “world’s first screen” at the NASDAQ big screen in Times Square, New York, USA.
Since its launch, Sodask has always adhered to the innovative concept of creating a fully self-service international student education and teaching platform, providing quality services for thousands of students, and has been trusted by users.
This time on the Nasdaq big screen, not only represents the affirmation and recognition of Sodask, but also expresses Sodask’s ideal and vision for the future leading education industry.
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