If these two shapes are similar what is the measure of the missing length s?

Use the graph of the sine function y=2sinθ shown below

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.

Ab and bc are tangent to circle d. find x is ab = 3x + 8 and bc = 26. find x