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OpenStudy (anonymous):
A football is thrown in the air. The height, h(t), of the ball in metres after t seconds is modelled by h(t)= -4.9(t-1.25) +9 a) How high off the ground was the ball when it was thrown
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OpenStudy (campbell_st):
are you sure the equation isn't \[h(t) = -4.9(t -1.25)^2 + 9\]
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