Can someone me with part 1, 2, and 3? i am alittle confused. will give brainliest answer.

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.

Evaluate the following expression 1/3^2

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2