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Flight of a Model Rocket A model rocket is launched from the ground with vel- ocity $$48 ft$$ per sec at an angle of $$60 ^ { \circ }$$ with respect to the ground.
$$\left. \begin{array} { c } { \text { (a) } x = 24 t , y = - 16 t ^ { 2 } + 24 \sqrt { 3 } t } \\ { \text { (b) } y = - \frac { 1 } { 36 } x ^ { 2 } + \sqrt { 3 } x \quad \text { (c) } 2.6 sec ; 62 ft } \end{array} \right.$$