Question: An object is thrown upward at time LaTeX: t = 0 t = 0 . After LaTeX: t t seconds, the ball's position above the

An object is thrown upward at time LaTeX: t = 0 t = 0 . After LaTeX: t t seconds, the ball's position above the ground is given by LaTeX: s(t) = -4.9t^{2} + 8t + 1 s ( t ) = 4 . 9 t 2 + 8 t + 1 , where s is measured in meters. What is the velocity at LaTeX: t = 1 t = 1 ?

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