The graph of y = 4x2 - 4x – 1 is shown. Use the graph to find estimates for
the solutions of
i) 4x2 - 4x – 1 = 0

ii) 4x2 - 4x - 1 = 2

Amass weighing 16 pounds stretches a spring 8/3 feet. the mass is initially released from rest from a point 2 feet below the equilibrium position, and the subsequent motion takes place in a medium that offers a damping force that is numerically equal to 1/2 the instantaneous velocity. find the equation of motion if the mass is driven by an external force equal to f(t)=cos(2t).