At the 2008 Olympics the Jamaican runner Usain Bolt ran the 100. meter dash in world record time of 9.69 seconds. What is this speed in miles per hour? [1 mile = 1.609 km]
A) 2.31 mph
B) 4.33 mph
C) 23.1 mph
D) 43.3 mph
C
Environmental & Atmospheric Sciences
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