You lent $680 to a friend for one year at a nominal rate of interest of 3 percent. Inflation during that year was 2 percent. Did you experience an increase or decrease in the purchasing power of your money

the purchasing power of the money increased

Explanation:

first we must calculate the future value of the money that was lent:

future value = present value x (1 + interest rate) = $680 x 1.03 = $700.40

if we want to know if the purchasing power of our money remains the same or not, we must discount the future value of the loan using inflation rate as the discount rate:

present value = future value / (1 + discount rate) = $700.40 / 1.02 = $686.67

the net present value of our loan = $686.67 - $680 = $6.67, so the purchasing power of our money increased

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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.