You pipette 1mL from a 30mL starting culture into a 99mL blank labeled A. You plate 1mL and 0.1mL of blank A onto plates B and C, respectively. Plate B has 310 colonies and Plate C has 31 colonies. What is the total cfu of the original culture? Select one: a. 9.3e5 b. 3.1e3 c. 3.1e4 d. 9.3e4 e. 3.1e5

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Scientific Notation

We have to deal with quantities that are extremely large or very small. For example- I may have 6,500,000,000 red blood cells, or the diameter of an iron atom is 0.000000011 inches. Numbers with many zeros can be inexpedient to work with, so scientists use scientific notation. It represents very large numbers or very small numbers in a simple form. We know that whole numbers can be extended to infinity, but we cannot write such large numbers on paper. Numbers that present in millions of places after the decimal point need to be represented simply. Thus, it is difficult to represent a few numbers in their extended form. Therefore, we use scientific notation.