the standard meridian upon which time is based for san francisco, usa is 90 degrees west. the standard meridian upon which time is based for cape town, south africa is 30 degrees east. this is a three part question. answer all parts, and describe the math used to solve. a) calculate the longitudinal distance in degrees between these two standard meridians heading west from san francisco towards cape town. (1 pt) b) calculate the longitudinal distance in degrees between these two standard meridians heading east from san francisco towards cape town. (1 pt) c) adding these two longitudinal distances together will take you the whole way around the world, and thus equals how many total longitudinal degrees