Which of the following points is a focus of the ellipse 9x2+25y2=2259x^2 + 25y^2 = 2259x2+25y2=225?
(4,0)(4, 0)(4,0)
(0,4)(0, 4)(0,4)
(3,0)(3, 0)(3,0)
(0,3)(0, 3)(0,3)