A Dose of 1000 Bacteria Can Kill 50% of the Animals

question 37

Multiple Choice

A dose of 1000 bacteria can kill 50% of the animals and a dose of 2400 can kill 70% of the animals.What is the approximate LD₅₀?

• A)1000
• B)2400
• C)150
• D)1700

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Definitions:

Positive Exponents

Represent numbers multiplied by themselves a certain amount of times, indicating a base raised to the power of a positive number.

Expression

A combination of numbers, variables, and mathematical operations that represents a particular value.

X

Often used in mathematics as a variable or unknown value in equations and algebraic expressions.

Simplify

The process of altering an expression to make it easier to understand or work with, often by combining like terms or eliminating complex fractions.