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A ball is thrown vertically upward from the top of a 100 foot tower, with an initial velocity of 10 ft/sec. Its position function is

A ball is thrown vertically upward from the top of a 100 foot tower, with an initial velocity of 10 ft/sec. Its position function is s(t) = -16t ²+ 10t + 100. What is its velocity in ft/sec when t = 2 seconds?

-32

-38

-54

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