Open cones are made from nets cut from a large sheet of paper 1.2m x 1.0m. if a cone has a radius of 6cm and a slant height of 10cm, how many cones can be made from the sheet? (assume there is 5% wastage of paper)

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).