calculus

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The height (in feet) of a skydiver at time t (in seconds) after opening his parachute is given by h(t) = 4000 – 19t. Find the skydiver's velocity after the parachute opens. The answer should be in feet per seconds.

I would appreciate if somebody helps.... Thank you.

  • calculus -

    19

  • calculus -

    - 19

  • calculus -

    21

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