Using the numbers given write an equation that has a solution of 4

Pick the description of a geometric object that best matches the real world object box for a deck of card

Need same math paper but the back now i hope your able to read it cleary i need with hw

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).