Shryia read a book cover to cover in a single session, at a constant rate. After reading for 1.51 hours , she had 402 out of the total 480 pages left to read .

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.