3452 students were polled asking who they supported for student body president, 37% support jill steins. 35% support gray johnson. the add 28% is spread out among 42 other 3rd party candidates none of which are polling greater than 2%. working with a 95% confidence level, estimate the margin of error:

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).