K k is a real number such that. K 0 k 0 and also. The kerosene is purified by removing pollutants using a clay filter.
Y ab x for a 0 and 0 b 1.
This is an example for the function f x 2 e3x This is just a particular case of the general form f x a ekx where a is a constant representing the value at start and k is the rate of growth when k 0 or the rate of decay when k 0. In mathematical modeling we choose a familiar general function with properties that suggest that it will model the real-world phenomenon we wish to analyze. David owns a chain of fast food restaurants that operated 200 stores in 1999. General rule for modeling exponential decay.