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The map below shows stars, asteroids, and the different routes that can be taken in order to travel from Star A1 to its companion star, Star A2. If you are only allowed to travel north, northeast, or east, how many possible routes exist between the members of this binary star system?


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Imagine the Universe! is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NASA's Goddard Space Flight Center.

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Project Leader: Dr. Barbara Mattson
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This page last updated: Thursday, 21-Nov-2002 11:20:10 EST