What is the appropriate equation used that would solve for x

Which equations represents circles that have a diameter of 12 units and a center that lies on the y-axis? check all that apply

Alake near the arctic circle is covered by a 222-meter-thick sheet of ice during the cold winter months. when spring arrives, the warm air gradually melts the ice, causing its thickness to decrease at a constant rate. after 333 weeks, the sheet is only 1.251.251, point, 25 meters thick. let s(t)s(t)s, left parenthesis, t, right parenthesis denote the ice sheet's thickness sss (measured in meters) as a function of time ttt (measured in weeks).

Which graph corresponds to the function f(x) = x2 + 4x – 1?