Martha biked 18 2/3 miles in 2 hours and 40 minutes. What was her average rate of speed in miles per hour?
A. 7
B. 7 2/3
C. 8 1/3
D. 9
E. 9 1/3![]()
A. 7
B. 7 2/3
C. 8 1/3
D. 9
E. 9 1/3