Pls help me pls someone smart I’m prying yo god if u read this

Pls will give brainliest and all p.s u can zoom in if u cant see plss

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.

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?