AnswersMathematics IIIDensity and Design Problems — QuizQuestion 8
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Density and Design Problems — Quiz

Question 8 • Mathematics III

A medical researcher has two petri dishes containing viruses. Dish B has a population density of 1 point 2 viruses per square millimeter. Dish A has an area of about 2 comma 826 square millimeters. If both petri dishes have the same population density, approximately how many viruses are in Dish A?

Answer
A
23 comma 550 viruses
B
33 comma 912 viruses
C
3 comma 391 viruses
D
2 comma 355 viruses

Explanation

Multiply Dish A’s area by the population density: 2,826 square millimeters × 1.2 viruses per square millimeter = 3,391.2 viruses. Rounding to the nearest whole virus gives approximately 3,391 viruses, which is choice B.

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