EW/FS/FF/MMC3.4.4. BASIC MATHEMATICS Algebra – Logarithms For the following equation x is expressed as a power y to a numerical value of b: The logarithm of x with respect to b (base number): The antilogarithm of y: The two common bases used are 10 and the natural log e (Euler’s constant – 2.718). The relation between base 10 and base e is: Typical properties of logarithms are: Contact: ewisa@wamsys.co.za URL: www.waterinfo.co.za Prepared by: eWISA Copyright: All right reserved Sponsored by: MMC3.4.4. eWISA Business website is an initiative to improve the skills of all South Africans working in the water sector. It is a partnership between WISA and WAMTechnology cc.