Question

a scientist has four petri dishes of different sizes. each dish contains a different number of bacteria
find each population density, to the nearest hundredth. which statement is true?
dish a has the lowest population density
dish c has the greatest population density
dish a and dish b have approximately the same population density
dish c and dish d have approximately the same population density

Explanation:

Step1: Calculate population density for Dish A

Population density = $\frac{Population}{Area}$. For Dish A: $\frac{7200}{2826}\approx2.55$

Step2: Calculate population density for Dish B

For Dish B: $\frac{10000}{7850}\approx1.27$

Step3: Calculate population density for Dish C

For Dish C: $\frac{13650}{20096}\approx0.68$

Step4: Calculate population density for Dish D

For Dish D: $\frac{21350}{31400}\approx0.68$

Answer:

Dish C and Dish D have approximately the same population density.