WaterChefÂ® Premium Countertop Filter Cartridges. Combining the power of solid carbon block filtration with a unique, proprietary blend of additional filter medias, WaterChefâs innovative Big Blockâ¢ Filtration technology maximizes contaminant reduction and delivers up to 1,000 GALLONS (3,785 L) of freshly filtered water with a single cartridge!
Definition provided by Wikipedia. Student-teacher ratio refers to the number of teachers in a school or university with respect to the number of students who attend the institution. For example, a student teacher ratio of 10:1 indicates that there are 10 students for every one teacher. The term can also be reversed to create a teacher-student ratio.
DEFINITION of 'Retention Ratio'. The proportion of earnings kept back in the business as retained earnings. The retention ratio refers to the percentage of net income that is retained to grow the business, rather than being paid out as dividends.