An environmental scientist obtains a sample of water from an irrigation canal that contains a certain type of bacteria at a concentration of 3 per milliliter. Find the mean
Number of bacteria in a 4-milliliter sample.
A) 12
B) 3
C) 3.5
D) 1.7

Question

Quizplus · Accepted Answer

The mean number of bacteria in a 4-milliliter sample is calculated by multiplying the concentration of bacteria per milliliter by the volume of the sample. Since there are 3 bacteria per milliliter, a 4-milliliter sample would contain 3 * 4 = 12 bacteria.

An Environmental Scientist Obtains a Sample of Water from an Irrigation