Each cube in this figure is a -millimeter cube. what is the total volume of the prism?

9 mm3
2 mm3
6 mm3
4 mm3

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.