Blue glacier supplies makes rock climbing ropes in different lengths. the factory has 2,500 meters of rope that will be cut to make some shorter 60-meter ropes and some longer 70-meter ropes. the factory owner wants to produce at least 40 ropes.
which pairs (s,) represent possible numbers of shorter and longer ropes the factory could make?
a. (45,-3)
b. (25,14)
c. (34,6)
d. (30,10)