PLEASE ANSWER Jack has the following scores on exams in his math class.

81, 87, 93, 89, 61, 81

If he wants to make his performance sound as good as possible, which measure should he use—the mean, the median, or the mode of his exam grades when
he talks about how he is doing? Explain.

In you response, make sure to: a. calculate the mean,
b. calculate the median, and
c. calculate the mode of his exam grades
d. compare and pick the measure that makes his performance sound as good as possible.

Asquare is dilated by a scale factor of 1.25 to create a new square. how does the area of the new square compare with the area of the original square? a)the area of the new square is 1.25 times the area of the original square. b)the area of the new square is 2.50 times the area of the original square. c)the area of the new square is 1.252 times the area of the original square. d)the area of the new square is 1.253 times the area of the original square.

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

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