Afarmer needs to drive from his farm into town to pick up supplies. he usually drives 29 miles on a straight stretch of highway, but because of road construction, he must take a detour. the detour consists of driving 21 miles, turning at a right angle at an intersection, and then driving some more as shown. how many miles does the detour add to the farmer’s commute into town? a) 8 miles b) 10.5 miles c) 12 miles d) 15.7 miles