Small earthworms travel at speeds of about 0.2 centimeters per second. What is this speed in meters per second? 0.0002 meters per second

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.