David biked 16 1/3 miles in 2 hours and 20 minutes. What was his average rate of speed in miles per hour?	Select the correct option.
A) 7  B) 7 2 / 3  C) 8 1 / 3  D) 9  E) 9 1 / 3

Rationale: d = 16 ( 1 / 3 ) = 49 / 3 t = 2 ( 1 / 3 ) = 7 / 3 s = d / t = 7 answer = a
Answer: A