**BRAINLIEST IF ANSWERED* PLEASE HELP***
What is the center of a circle represented by the equation (x+5)^2+(y-10)^2=(10)^2? *

(5,10)
(5,-10)
(-5,-10)
(-5, 10)

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).