Question: A timer is started and a few moments later a model airplane is launched from the ground. Its height in feet as a function of

A timer is started and a few moments later a model airplane is launched from the ground. Its height in feet as a function of time in seconds after the timer was started is given by the equation, h(t) = -(t-10)2+ 121 How long after launch does it reach its maximum height and how high is that

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