A circular Petri dish has a diameter of 10 centimeters. If the dish contains 2.450 bacteria, what is the

population density of bacteria in the dish?

(1) 31 bacteria per square centimeter

(2) 42 bacteria per square

centimeter

(3) 48 bacteria per square centimeter

(4) 51 bacteria per square centimeter

Answer: 31 bacteria per square centimiter.

Step-by-step explanation:

The correct number of bacteria in the question is 2,450.

Hi, to answer this question we have to apply the next formula:

Area of a circle = π x (diameter/2) ^2

Replacing with the values given:

A = π x (10/2) ^2

A = π x (5) ^2

A = π x 25 = 78.54 cm2

Next, we have to divide the number of bacteria (2,450) by the area of the dish

2450 / 78.54 = 31.19 = 31 bacteria per square centimiter.

Feel free to ask for more if needed or if you did not understand something.