Plz can someone help me out?

Which statement describes the term economics? a. it is the study of using limited resources to fulfill wants and needs. b. it is the study of how governments fulfill the wants and needs of nations. c. it is the study of how people spend their money to fulfill wants and needs.

Toyland is having a sale. all items are 20% off. how much will you save on an item that usually sells for 95$ explain your

Let r = 3. what is the value of r + 58?