(WILL MARK BRAINLIEST IF THE ANSWER IS CORRECT!) I have 4/5 marks and I really need help getting the last mark on this MathsWatch question. The two triangles in the diagram are similar. There are two possible values of x. Work out each of these values. State both assumptions* you make in your working. * You must state which triangles you are assuming to be similar.

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).