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The height of a ball tossed in the air can be modelled by the equation, h ( t ) = 5 t^ 2 + 7

The height of a ball tossed in the air can be modelled by the equation, h(t) = 5t^2 + 7t + 6

  1. Determine an expression for the velocity of the ball as a function of t.
  2. When is the ball stationary? Is there anything significant about this point? Explain.
  3. How fast was the ball moving when it was tossed?
  4. How fast was it moving when it hits the ground?

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