Use stokes' theorem to evaluate c f · dr where f(x, y, z) = x2yi + 1 3 x3j + xyk and c is the curve of intersection of the hyperbolic paraboloid z = y2 − x2 and the cylinder x2 + y2 = 1 oriented counterclockwise as viewed from above.

Little's law can be applied to any part of the store, such as a particular department or the checkout lines. the store owner determines that, during business hours, approximately 84 shoppers per hour make a purchase and each of these shoppers spend an average of 5 minutes in the checkout line. at any time during business hours, about how many shoppers, on average, are waiting in the checkout line to make a purchase at the good deals store?