katlyn10289 katlyn10289

06-04-2018
Mathematics

contestada

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 fish?

(1) 31 bacteria per square centimeter
(2) 42 bacteria per square centimeter
(3) 48 bacteria per square centimeter
(4) 51 bacteria per square centimeter

Respuesta :

mkryukova19 mkryukova19

06-04-2018

Density=population/area circle, radius=10/2=5 cm
Density=population/(πr²)=2450/(π*5²)≈31
(1) 31 bacteria per square centimeter

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