Plot the coordinates A (1,2), B ( 4,5) , C(1,-1) and D (1, -1), If the points are not formed what polygon is formed

The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). the mean maximum oxygen uptake for elite athletes has been found to be 60 with a standard deviation of 7.2. assume that the distribution is approximately normal.

Need ! discuss how to convert the standard form of the equation of a circle to the general form. 50 points

When y’all answer can y’all explain too !