A. c equals zero.
b. c is greater than zero.
c. it is not possible to tell whether c is greater than or less than zero.
d. c is less than zero.

i think it is d.

Renee hiked for 6 3 /4 miles. after resting, renee hiked back along the same route for 5 1 /4 miles. how many more miles does renee need to hike to return to the place where she started? represent your answer as a simplified mixed number, if necessary.