Which equation can be used to find the answer? a state highway department plans to resurface 136 miles of highway during a six-month period. they have resurfaced 59 miles so far. how many more miles do they have left to resurface? a. m ÷ 2 = 59 m = 118 118 mi b. m + 59 = 136 m = 77 77 mi c. m – 59 = 136 m = 195 195 mi d. m ÷ 2 = 139 m = 278 278 mi