Question: the question An object's position is given r(t) = (-47 m + 8 m/s t) x + (10 m + 5 m/s t + 1.7

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An object's position is given r(t) = (-47 m + 8 m/s t) x + (10 m + 5 m/s t + 1.7 m/s3+3) y where x and y are the x and y unit vectors. At what time, in seconds, is the magnitude of the object's acceleration equal to 47 m/s

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