Solve.A marathon runner finished his 26.2-mile race in 2 hr 19 min 52 sec. What was his average speed in mph and km/h? (Round to the nearest tenth.)
A. 14.7 mph, 9.8 km/h
B. 9.8 mph, 14.7 km/h
C. 11.2 mph, 18.0 km/h
D. 18.0 mph, 11.2 km/h
Answer: C
Mathematics
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A. b = 
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