science
posted by jamie .
The population of Singapore is 4987600 people. The territory of Singapore is 710.2 km^s. The population of Namibia is 2171000 people, while its territory is 824292 km^2. Estimate the population densities of Singapore and Namibia.

I am not going to do your work for you.
I will be happy to critique your work. 
singapore: 4987600/710.2=7023
namibia:2171000/824292=2.63378