A man claims that his lot is triangular, with one side 450 m long and the adjacent side 200 m long. The angle opposite one side is . Determine the other side length of this lot to the nearest metre.

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).