last year, mountain top, inc., purchased a coal mine at a cost of $900,000. the salvage value has been estimated at $100,000. the coal mine has an estimated 200,000 tons of available coal. a total of 70,000 tons were mined and sold during the current year.

answer; im, thinking it should be (7yrs)///plz check first.good luck

answer: a. the kind of population living in your neighbourhood.

the census explorer data tool by the us census bureau allows the user to zoom in on any neighbourhood within the united states and find the kind of people residing in that by race and age.  

the tool needs to needs to be used twice – once in order to find what type of people reside in a neighbourhood, and then to see the age groups of the people in the same neighbourhood.