Answer:
Sammy's dad traveled 450 miles in 9 hours.
Explanation:
mph =

Miles = 150
Hours = 3
Plug into the formula of distance/time

Sammy's dad is driving at 50mph
In three hours you can use this formula:

Multiply both sides by 9:

Solve:


Sammy's dad traveled 450 miles in 9 hours.
Hope this helped! :)