6mm is the arc length, 27mm^2 is the Area.Please help me find the radius and angle at center

To find the extreme values of a function f(x.y) on a curve x-x(t), y y(t), treat f as a function of the single variable t and use the chain rule to find where df/dt is zero. in any other single-variable case, the extreme values of f are then found among the values at the critical points (points where df/dt is zero or fails to exist), and endpoints of the parameter domain. find the absolute maximum and minimum values of the following function on the given curves. use the parametric equations x=2cos t, y 2 sin t functions: curves: i) the semicircle x4,y20 i) the quarter circle x2+y-4, x20, y20 b, g(x,y)=xy

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?