Suppose you live in Location A, a part of the United States with a semiarid climate. You travel to Location B, which is in a neighboring area. There you find a humid continental climate. In which direction is Location B likely to be, relative to Location A? What is the best explanation for the difference?

West of 100°W, much of the U.S. has a cold semi-arid climate in the interior upper western states (Idaho to the Dakotas), to warm to hot desert and semi-arid climates in the southwestern U.S. East of 100°W, the climate is humid continental in northern areas (locations roughly above 40°N, Northern Plains, Midwest, Great ...

54/3 is 18 so 18 is your answer