SOLUTION: How fast would a ball have to be thrown upward to reach a maximum height of 121 ft? [Hint: Use the discriminant of the equation 16t2 − v0t + h = 0.]

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Question 756178: How fast would a ball have to be thrown upward to reach a maximum height of 121 ft? [Hint: Use the discriminant of the equation 16t2 − v0t + h = 0.]
Answer by Alan3354(69443) About Me  (Show Source):
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How fast would a ball have to be thrown upward to reach a maximum height of 121 ft?
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It's the speed the ball would reach if dropped from 121 feet
find the time:
121 = 16t^2
t = 11/4 seconds
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v = at
v = 32*(11/4)
v = 88 ft/sec