Question: A ball is thrown straight upward. The function f(t) = -16t 2 +80t describes theball's height above theground, f(t), infeet, t seconds after it is

A ball is thrown straight upward. The function f(t) = -16t²+80t describes theball's height above theground, f(t), infeet, t seconds after it is thrown. Complete parts a through c.

find f (3)

f(3)=

please explain step by step, since i am not sure what is part b through c

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