Andrea deposits $500 in a bank for a fixed duration of two years. in the second year, she earns interest on the principal amount, which includes $500 and the interest earned in the first year. here, andrea has gained profit through which form of interest earning?

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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.