Carrie and krystal are taking a road trip from greenville to north valley. each person has her own map, and the scales on the maps are different. a) on carrie's map, greenville and north valley are 4.5 inches apart. the scale on her map is 1 inch = 20 miles. how far is greenville from north valley? b) the scale on krystal’s map is 1 inch = 18 miles. how far apart are greenville and north valley on krystal’s map?