8800000 in scientific notation

If x = 12 and y = 3, what is the value of x - y 2? 81 6 3 18

Can someone me with this problem i don't understand i need

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.