Atoss of a 15-sided die is equally likely to be any integer between 1 and 15 inclusive. what is the expected value of the number tossed? provide your answer to a single decimal point.

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).