The Carbohydrate Fermentation test uses Phenol Red Broth to test for the fermentation of different sugars. It is one of the fermentation tests, others include the Methyl Red test and the Voges-Proskauer test.
The main reason why we use hexadecimal numbers is because it is much easier to express binary number representations in hex than it is in any other base number system. Computers do not actually work in hex (donât laugh, beginning students do ask that question). Lets look at an example, using a byte.
Your computer doesn't have a problem with it since it is all that a computer can understand. To make coding easier for your standard human programmer, binary is converted to Hexadecimal, making programs much easier to code. HEX converts to binary. Groupings of 4 binary places have a HEX value.