In samantha's english class, her current grade is calculated by finding the average of the scores she received on her terms papers. samantha's last term paper brought her average up to a 91 from an 89, which was her average from the first three. samantha claims that she scored a 97 on her fourth term paper. is samantha's claim true?

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

A(1,1) b(-3,0) c(-4,-1) d(3,-2) drag it to correct position

Tan198=asin164=? how to solve this? ?