Once understood, the economies of mass production were applied to most sectors of the American economy. Universities, hospitals, and airlines are prime examples. Describe how the concept of mass production, standardization, and specialization have been applied to lower the cost of a college education.

Joe pays ann to mow his lawn and ann mows vanna's lawn by mistake. vanna peers out her window and sees ann mowing, yet says nothing to ann about her mistake since vanna needs to have her lawn mowed. when ann approaches vanna for payment, vanna refuses, arguing that she never asked ann to mow her lawn. under these circumstances, ann can recover payment from vanna under: