1) Mr. R and his wife looked to see how much money they had on them when they were out. Mr. Ratliff had $58.79 in his wallet. If together they had $198.24, how much money did Mrs. Ratliff have? Use an addition equation to solve.

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).