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7. A student runs at 4.5 m/s [270 S of W] for 3.0 minutes and then he turns and runs at 3.5 m/s [350 S

7. A student runs at 4.5 m/s [270 S of W] for 3.0 minutes and then he turns and runs at 3.5 m/s [350 S of E] for 4.1 minutes. a. What was his average speed? b. What was his displacement

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