What is the name of the shape graphed by the function r^2 = 4costheta

Triangle xyz has vertices x(1,3), y(0,0)

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.

The quadratic function h(t)=-16.1t^2+150 choose the graph representation