Question: in august 2009 usain bolt of jamaica set a new...
In August 2009, Usain Bolt of Jamaica set a new World Record in the 100 m dash, with a time of
9.58 s. What was Usain's average speed in mi/hr?
1 mi = 1.61 km
1 hr = 3,600 s
An area of 50 mm^2 is equal to how many m^2?