9. If ATLY ~ ACHK, find the value of x.

Find the average rate of change for the given function drom x=1 to x=2

Use stokes' theorem to evaluate c f · dr where c is oriented counterclockwise as viewed from above. f(x, y, z) = xyi + 5zj + 7yk, c is the curve of intersection of the plane x + z = 8 and the cylinder x2 + y2 = 81.

Look at the figure xyz in the coordinate plane. find the perimeter of the figure rounded to the nearest tenth.