Exponential functions are, for example, y=x^3, y=x^4, etc.

3^x = (540-60), since 1 to any exponent is 1, then in order to obtain 60, we just add 60 to the equation, but we are looking for an exponent of 3 to give us 540-60

That stand for (power to), since I don't have the superscript key on my computer. Do you know when you see parabola equation and it says y= x^2 (y equals x squared?). ^ is my shortcut for (raised to the power).

Just like x^3 (x raised to the 3rd power), I do not have access to special math symbols on my computer such as "squared", "cubed" "square root" or "cube root". My computer is old and every time I try to add math add-ins, they never work. I guess my computer is too old.