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An object is first seen at a location <1.0, 5.0> m, traveling with a velocity <3.0,...

An object is first seen at a location <1.0, 5.0> m, traveling with a velocity <3.0, 2.0> m/s. Sometime later the object is traveling with a velocity <5.0, 7.0> m/s. If the average acceleration of the object during this time period is <0.10, 0.25> m/s2, how much time in seconds elapsed between observations?

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