The Euler number, e or E, can be derived as compound interest, a series and Euler's formula.
Log is the inverse of the exponential function. "Log" stands for logarithmic function.
The derivative of the exponential curve's function is itself.
The exponential curve can be used to model the exponential growth in real-world applications, such as to create a model of a company's revenue growth rate.
The Euler number has the value of 2.71828.