Akiko leaves the mall and drives directly west at a speed of 60 mph. At the same time, Kosuke leaves the mall and drives 40 degrees north of east at a speed of 45 mph. How far apart are they after 45 minutes? Round the answer to the nearest tenth of a mile.
A.17.4 miles
B.28.9 miles C.44.5 miles D.74.1 miles