A ball is thrown downward with a speed of 16 ft/s from the top of a 256-foot-tall building. After t seconds, its height above the ground is given by s(t) = -32t² - 16t + 256. (a) Determine how long it takes for the ball to hit the ground. sec (b) Determine the velocity of the ball when it hits the ground. ft/sec

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Chapter10: Quadratic Equations
Section10.4: Solve Applications Modeled By Quadratic Equations
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A ball is thrown downward with a speed of 16 ft/s from the top of a 256-foot-tall building. After t seconds, its height above the ground is given by
s(t) = -32t² - 16t + 256.
(a) Determine how long it takes for the ball to hit the ground.
sec
(b) Determine the velocity of the ball when it hits the ground.
ft/sec
Transcribed Image Text:4 A ball is thrown downward with a speed of 16 ft/s from the top of a 256-foot-tall building. After t seconds, its height above the ground is given by s(t) = -32t² - 16t + 256. (a) Determine how long it takes for the ball to hit the ground. sec (b) Determine the velocity of the ball when it hits the ground. ft/sec
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