you select a marble from those seen without looking and then put it back. if you do this 5 times, what is the best prediction possible for the number of times you will pick a purple marble? a. 1 b. 2 c. 3 and d. 4

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.