Question 886244
After hour 1:
M = 9 miles
P = 0
After hour 2:
M = 18 miles
P = 0
After hour 3:
M = 27 miles
P = 18 miles
After hour 4:
M = 36 miles
P = 36 miles
.
The pontoon boat will *catch up to* the motorboat after four hours.  So, it will actually *pass* the boat a 4 hours 1 second ;-).