Andrew dives off a jetty. His height above the water is t seconds after diving m is given by H(t) = −4t 2 + 4t + 3 metres, t ≥ 0.
2 + 4t + 3 metres, t ≥ 0.
a How high above the water is the jetty?
b How long does it take for Andrew to reach the maximum height of hid dive?
c How far is Andrew above the water at his highest point?
d How long does it take for Andrew to hit the water?