List all possible roots of
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Answer:
<h2>The maximum height is 20 feet.</h2>Step-by-step explanation:
The height of the ball after t seconds is given by .
For any function, at the maximum point, first order differentiate of the function will be 0, and the second order differentiate will be less than 0.
Now, .
As per the given condition, .
Whatever the value of t is, the second order differentiate of the function is -20, that is .
Hence, at t = , the height of the ball will be maximum.