A pumpkin is launched 19.6 meters per second from a 58.8 meter tall platform. The equation for the object's height s at time t

Question

A pumpkin is launched 19.6 meters per second from a 58.8 meter tall platform. The equation for the object's height s at time t seconds after launch is s (t)=-4.92t2 +19.6t+58.8, where s is in meters. When does the pumpkin strike the ground?

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