A Sample of Milk Is Tested for Its Bacterial Content

question 18

Multiple Choice

A sample of milk is tested for its bacterial content in a plate count assay.A one-milliliter sample of the milk is diluted in a 1:10 dilution series.One milliliter of the third dilution tube is plated in a pour plate.After incubation,the plate has 54 colonies,indicating that the original milk sample contained

• A)54 cells per milliliter.
• B)540 cells per milliliter.
• C)5,400 cells per milliliter.
• D)54,000 cells per milliliter.
• E)540,000 cells per milliliter.

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Definitions:

Coefficients

Numbers or constants placed before and multiplying the variables in an algebraic expression, indicating their relation.

Simplify

The process of making an expression or equation easier to understand or solve by reducing its complexity.

Like Terms

Terms in an algebraic expression that have the same variables raised to the same powers, allowing them to be combined through addition or subtraction.

Associative Property

A mathematical rule that states the way in which numbers are grouped (associated) does not change their sum or product.