dorabella and guillermo and rowing on the same river in the same direction. dorabella is rowing her canoe at 7 mph and is exactly 4 miles ahead of guillermo, who is rowing his cnoe and 9 mph. How many hours will it take guillermo to catch dorabella

Let's first calculate the relative speed between Dorabella and Guillermo.

Since they are traveling in the same direction, the relative speed would be the difference in their speeds:
Relative speed = 9 mph - 7 mph = 2 mph

Now, we can calculate the time it takes for Guillermo to catch Dorabella using the formula:

Time = Distance / Relative speed

Distance = 4 miles (as Dorabella is 4 miles ahead)
Relative speed = 2 mph

Time = 4 miles / 2 mph = 2 hours

Therefore, it will take Guillermo 2 hours to catch Dorabella.