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In a pool at an aquarium, a dolphin jump...

In a pool at an aquarium, a dolphin jumps out of the water travelling at 20cm per second. Its heigth above water level after t second is given by `h=20t-16t^2`.

Based on the above, answer the following questions:
(i)Find zeroes of polynomial `p(t)=20t-16t^2`
(ii)Which of the following types of graph represents `p(t)`?

(iii) (a) What would be the value of h at `t=3/2`? Interpret the result.
(iii) (b) How much distance has the dolphin covered before hitting the water level again ?

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