Jen, paula and sarah had spent the week decorating an elderly neighbor's house, for which they earned $500 between them. when it came to dividing up the money paula claimed she had worked three times harder than jen, and sarah had worked twice as hard as paula. if the money was divided fairly, how much money did they each receive?

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).