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Mathematics 16 Online
OpenStudy (anonymous):

Two people on bikes are separated by 350 meters. Person A starts riding north at a rate of 5 m/sec and 7 minutes later Person B starts riding south at 3 m/sec. At what rate is the distance separating the two people changing 25 minutes after Person A starts riding? A5 m/sec B8 m/sec C1 m/sec D4 m/sec E10 m/sec

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