Afarmer needs to buy fertilizer for two fields. one field is shaped like a trapezoid, and the other is shaped like a triangle. the trapezoidal field has bases that are 35 and 48 yards and a height of 26 yards. the triangular field has the same height and a base of 39 yards. each bag of fertilizer covers 150 square yards. use a problem solving model to find how many bags of fertilizer the farmer needs to buy