Find the value of x.

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 !