If the population density of a certain marine species is 3 per cubic meter of water, then what is the total population of the species in a body of water that is 1,000 cubic meters in volume?

Explanation:

Given

Population Density of marine species population cubic meter of water

Total volume of water cubic meters

The number of species in  a given habitat

Where is the density of population per unit area or volume

S is the size of habitat for a given population. It can be area , volume or any other unit of measurement.

Substituting the given values in above equation, we get -

because of