Andrew decided to get cable tv for $43 per month. dough buys a satelite dish for $104 and pays $30 per month for satelite tv. after how many months will andrew and dough have paid the same amount for tv servces?

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).