What is the range of f(x)=16−x2f(x) = \sqrt{16-x^2}f(x)=16−x2?
[0,4][0, 4][0,4]
[0,16][0, 16][0,16]
[−4,4][-4, 4][−4,4]
[0,∞)[0, \infty)[0,∞)