Need help 15-18. Max points

What are the sotions to the quadratic equation 9x^2=4

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.

Simplify (1/2)4th power a. (1/16) b.(1/8) c.(1/4)