Question

If f(x) is the total number of bacteria present in a sample after x hours, which of the following statements best describes the meaning of f(2) = 12?

The total number of bacteria present in the sample after 12 hours is 2.

The total number of bacteria present in the sample after 6 hours is 2.

The total number of bacteria present in the sample after 2 hours is 12.

The total number of bacteria present in the sample after 6 hours is 12.

Answer 1

Answer: The total number of bacteria present in the sample after 2 hours is 12.

Explanation:

Given : f(x) is the total number of bacteria present in a sample after x hours,

The meaning of f(2) = 12 is At x= 2 , the total number of bacteria present in a sample is 12.

Since x represents the number of hours.

Therefore, the statement that best describes the meaning of f(2) = 12 is :

The total number of bacteria present in the sample after 2 hours is 12.

Answer 2

It is best to identify first the constants. From the function f(2) = 12, 2 here is x which is the number of hours and 12 which is equal to f(x) is the total number of bacteria. The meaning therefore of the function is, "The total number of bacteria present in the sample after 2 hours is 12."