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A ball is thrown upward. Its height above the ground is given by the function$$h(t) = -5t^{2} + 20t + 1 \text{ metres,}$$where \( t \) is the time in seconds from when the ball is thrown.
How high is the ball above the ground after 2 seconds?
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From what height above the ground was the ball released?
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At what times is the ball 16 m above the ground? (order from lowest to highest)
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