What is the value of f(x) when x=3 for the constant function f(x)=c?
+
In the cosine function f(x) = cos x, what is the amplitude of the graph?
+
Question: What is the volume V of a right circular cylinder with radius r and height h, and the surface area A of the cylinder, given by the formulas V = πr²h and A = 2πr² + 2πrh, respectively?