Question: An object throw directly upward is at a height of s = - 16t2 + 48t + 256 feel after t seconds (see Example 4).

An object throw directly upward is at a height of s = - 16t2 + 48t + 256 feel after t seconds (see Example 4).
(a) What is its initial velocity?
(b) When does it reach its maximum height?
(c) What is its maximum height?
(d) When does it hit the ground?
(e) With what speed does it hit the ground?

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