Select all the answers that are equivalent to 3/4: __ a) 30/40 __ b) 16/18 __ c) 24/32 __ d) 35/45 __ e) 36/48

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).