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## Homework Statement

If a new planet has a year of 3.44578 Earth years, what is its radius of orbit in meters if Earth's orbital radius is 149,597,870,700 meters?

Formula: r = (vt)/(2pi)

How can I use this without velocity?

All help is appreciated as I'm not sure how to go about this: forumlas, explanations, answers, etc.

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