Avegetable garden is 12 meters long by 7 meters wide. it is home to 168 mice. what is the population density of the mice?

Population density=number of mice / number of square meters.

1) we calculate the number of square meters.
area of a rectangle=length x width
area of a vegetagle garden=12 m * 7 m=84 m²

2) we calculate the population density

Population density=168 mice/ 84 m²=2 mice/m²

the population desity of the mice is 2 mice/m²

When the indian plate collided with eurasian plate because it was cool 

What do i have to choose from? what are the answer choices? .