At the end of a snow storm, Michael saw there was a lot of snow on his front lawn. The temperature increased and the snow began to melt at a steady rate. The depth of snow on Michael's lawn, in inches, can be modeled by the equation S=-2t+20,S=−2t+20, where tt is the time, in hours, after the snow stopped falling. What is the xx-intercept of the equation and what is its interpretation in the context of the problem?