The equation of a hyperbola is shown.
(x-3)^2/81-y^2/144=1
what are the coordinate of the center of the hyperbola?
a.) (3,0)
b.) (0,-30)
c.) (0,3)
d.) (-3,0)

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).