A child throws a ball straight upwards to his friend who is sitting in a tree 18 ft above ground level.
a. If the ball leaves the child’s hand at a height of 2 ft with an initial speed of 40 ft/sec, write a function representing the vertical position of the ball s(t) (in ft) in terms of the time t after the ball levels the child’s hand,
(Hint: Use the model
b. Determine the time interval for which the ball will be more than 18 ft high.
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COLLEGE ALGEBRA
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