You are in the market for a new refrigerator for your company’s lounge, and you have narrowed the search down to two models. The energy-efficient model sells for $1,700 and will save you $45 in electricity costs at the end of each of the next five years. The standard model has features similar to the energy-efficient model but provides no future saving in electricity costs. It is priced at only $1,500

It is better to buy an energy efficient model for $ 1700.

Explanation:

It is better to buy an energy efficient model for $ 1700 because at the end of five years its costs will be less than $ 1500. It  saves $ 45 each year and that would save $ 45*5 = $ 225 at the end of five years. That would result in low costs as $ 1700- $ 225= $ 1475 which is less than $ 1500.

Buying $1500 is not a smart choice because then it would add up to expenses . Expenses for $ 45 each year would result in $225 in five years that would add up to be $ 1725 which is higher than $ 1700.

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.