It takes Diego 124 of an hour to complete a lap on a circular bike track. The track is 13 mile long. What is Diego’s bike speed? A. 18 mile per hour
B. 18 hours per mile
C. 8 miles per hour
D. 8 hours per mile

Robin spent 25% more time on his research project than he had planned he’s been an extra h ours on the project which of the following expressions could represent the number of hours rob actually spent on the project