A scientist wants to estimate the population of sponges on a coral reef using quadrants. Each quadrant is 1 m squared. She counts 450 individuals in 22 quadrants. The total area of the reef is 960m squared

19636

Explanation:

Since area of each quadrant is .

And, the total area of reef is

So, the total number of quadrants = = 960.

Now, in 22 quadrants the number of individuals is 450.

So, in one quadrant the number of individuals =

That means there are individuals in each quadrant.

We have calculated that the in the total area of reef, there are 960 quadrants each with area .

So, the number of individuals in the total 960 quadrants = = 19636.36

As we are counting individuals so we will round off the final result to the nearest whole number so the final number of individuals(sponges) will be 19636.

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this