Chapter 8 exercises

//8.3
Public class Geometry
{
    public static void main(String[] args)
    {
     Scanner sc = new Scanner(System.in);
     System.out.print("Enter radius r: ");
         double radius = sc.nextDouble();
     System.out.print("Enter height h: ");
         double height = sc.nextDouble();
     output(radius, height);
    }
    public static public ­static ­double ­cubeVolume(double­ h)
    {
     double Volume = Math.pow(height/3);
     return Volume;
    }
    public static public ­static ­double ­cubeSurfaceArea(double­ h)
    {
     double SurfaceArea = Math.pow(height/2) * 6;
     return SurfaceArea;
    }
    public static double sphereVolume(double radius, double height)
    {
     double volume = Math.PI * Math.pow(radius/2);
     return Volume;
    }
    public static double sphereSurfaceArea(double radius, double height)
    {
     double SurfaceArea = 4 * Math.PI * Math.pow(radius/2);
     return SurfaceArea;
    }
    public static double cylinderVolume(double radius, double height)
    {
     Volume = Math.PI * Math.pow(radius/2) * height;
     return Volume;
    }
    public static double cylinderSurfaceArea(double radius, double height)
    {
     SurfaceArea = 2 * Math.PI * radius * height + 2 * Math.PI * Math.pow(radius/2);
     return SurfaceArea;
    }
    public static double coneVolume(double radius, double height)
    {
     Volume = 1.0/3.0 * Math.PI * Math.pow(radius/2) * height;
     return Volume;
    }
    public static double coneSurfaceArea(double radius, double height)
    {
     SurfaceArea = Math.PI * radius * Math.sqrt(Math.pow(radius/2) * Math.pow(height/2))
     return SurfaceArea;
    }
}

//8.13
Public class Numeric
{
    public static double Power(double x, int n)
    {
     if (n > 0 && n%2 == 0)
     {
      Math.pow(x/n) = Math.pow(x,(n/2.0))
     }
     if (n >0 %% n%2 != 0)
     {
      Math.pow(x/n) = Math.pow(x,(n-1))
     }
}