9. A football is kicked into the air. It's height in meters after t seconds is given by h(t) = -4.2(t – 3.2)2 + 25
a) What was the height of the football when it was kicked?
b)
What was the maximum height of the ball?
At what time was the maximum height reached?
c)
How high was the ball after 1 second?
d)
Was the ball still in the air after 5 seconds?