# Calculus

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Find the maximum height of a ball thrown upward from the top of a 640 ft tall building with an initial velocity of 128 ft/s

• Calculus -

y = 640 + 128t - 16t^2
y' = 128 - 32t
y'=0 when t=4
so, what's y(4)?

• Calculus -

896

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