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A weight on a spring is bobbing up and down. Its height above the ground at time t is h(t) = 5 + cos 2t.

A weight on a spring is bobbing up and down. Its height above the ground at time t is h(t) = 5 + cos 2t. Determine the velocity of the weight at time t = 4 . Be sure your calculator is in radian mode.

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