Question: Unit test Google Classroom Rachel is a stunt driver, and she's escaping from a building that is about to explode! D represents Rachel's remaining distance

Unit test Google Classroom Rachel is a stunt driver, and she's escaping from a building that is about to explode! D represents Rachel's remaining distance (in meters ) as a function of time t (in seconds). D=-38t+220 What is Rachel's speed? meters per second

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