What methods could you use to calculate the x-coordinate of the midpoint of a horizontal segment with the endpoints of (-12, 0) and (12, 0)? ** choose all that apply ** a. calculate the average of the x-coordinates b. divide 0 by 12 c. divide 12 by 2 d. take the average of the endpoint e. divide 2 by 12

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).