Determine whether each statement makes sense or does not make sense and explain your reasoning.
1. The functions f(x)=2-x and g(x) = -2xf(x)=2-x and g(x) = -2x have the same graph.
2. The base of an exponential function can be any real number.
3. The domain of F(x) = log(x) is the set of all real numbers.
4. log(-100) = -2
5. Some common logarithms can be evaluated without using a calculator.