the perfect application for a power-of-10 estimation

At first, there seem to be so many unknowns that the problem appears to be unsolvable.That is the perfect application for a power-of-10 estimation,as we don't need an exact answer -an estimation will work.We can start by determining how many people live in the city of Chicago.We know that it is a large city,but we may be unsure about exactly how many people live in the city.Are the one million people?Five million people?This is the point in the problem where many people become frustrated with the uncertainty,but we can easily get through this by using the power of 10.We can estimate the magnitude of the population of Chicago as 10 to the power of six.