The function h = -5t2 + 20t + 1 models the height, h metres, of a baseball as a function of the time, t seconds, since it was hit. The ball hit the ground before a fielder could catch it.
a) How long was the baseball in the air, to the nearest tenth of a second?
b) What was the maximum height of the ball?
c) For how many seconds was the height of the ball above 16 m?
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Answer:
10t+1
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