What is the difference between a shortage and a scarcity?
a. a shortage can be temporary or long-term, but scarcity always exists.
b. a shortage results from rising prices; scarcity results from falling prices.
c. a shortage is a lack of all goods and services; scarcity concerns a single item.
d. there is no real difference between a shortage and a scarcity.

Quick calculate the roi dollar amount and percentage for these example investments. a. you invest $50 in a government bond that says you can redeem it a year later for $55. use the instructions in lesson 3 to calculate the roi dollar amount and percentage. (3.0 points) tip: subtract the initial investment from the total return to get the roi dollar amount. then divide the roi dollar amount by the initial investment, and multiply that number by 100 to get the percentage. b. you invest $200 in stocks and sell them one year later for $230. use the instructions in lesson 3 to calculate the roi dollar amount and percentage. (3.0 points) tip: subtract the initial investment from the total return to get the roi dollar amount. then divide the roi dollar amount by the initial investment, and multiply that number by 100 to get the percentage.