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David is driving a steady 21.0 m/s when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.80 m/s^2 at the instant when David passes. a.)How far does Tina drive before passing David? Express your answer with the appropriate units. b.)What is her speed as she passes him? Express your answer with the appropriate units.

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