A ball is thrown upward from the top of a building 240 feet tall. The height of the ball is described by the function h(t) = -16t? + 18t +240, where t is in seconds and t = 0 corresponds to the moment the ball is thrown. a) Determine for what value of t the ball reaches the maximum height and determine this maximum height. t= and maximum height = b) Determine when the ball reaches the ground.

Elementary Algebra
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Author:Lynn Marecek, MaryAnne Anthony-Smith
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Chapter10: Quadratic Equations
Section10.4: Solve Applications Modeled By Quadratic Equations
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A ball is thrown upward from the top of a building 240 feet tall. The height of the ball is described by the function
h(t)=-16t + 18t + 240, where t is in seconds and t =
0 corresponds to the moment the ball is thrown.
a) Determine for what value of t the ball reaches the maximum height and determine this maximum height.
and maximum height =
b) Determine when the ball reaches the ground.
t=
Transcribed Image Text:A ball is thrown upward from the top of a building 240 feet tall. The height of the ball is described by the function h(t)=-16t + 18t + 240, where t is in seconds and t = 0 corresponds to the moment the ball is thrown. a) Determine for what value of t the ball reaches the maximum height and determine this maximum height. and maximum height = b) Determine when the ball reaches the ground. t=
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