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Mathematics, 08.07.2019 22:00 tot92

Aball is launched upward at 20 meters per second (m/s) from a 60 meter tall platform. the equation for the object's height s at time t seconds after launch is s(t) = –4.9t2 + 20t + 60, where s is in meters. what is the height above the ground when the object is launched? how long before the object hits the ground after launch? what is the maximum height of the object?

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