What is the value of f(x) when x=5, if f(x) is a constant function defined as f(x)=c?
+
What is the horizontal asymptote of the logarithmic function f(x) = log(x) - 3?
+
What is the relationship between the growth rates of exponential functions f(x) = 10^x and f(x) = e^x? Compare their behaviors as x approaches infinity.