Suppose a club publishes a newsletter. expenses are$.50 for printing and mailing each copy, plus$300 total for research and writting. the price of the newsletter is $2.00 per copy. how many copies of the newsletter must the club sell to break even?

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).