Lisa is filling a large coffee filter that is shaped like a cone. The dimensions of the cone are shown below. What formula is used to find the volume of the cone?(HELP ASAP) A: 1/3 (4 1/5) (π) (4.9)
B: 1/3 (2 1/10 ) (π) (4.9)
C: 1/3 (2 1/10)^2(π) (4.9)
D: 1/3 (4 1/5)^2 (π) (4.9)

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).