Answer:7 weeks
Step-by-step explanation:
Given
Initial weight of the dog [tex]W_i=42\ lbs[/tex]
Final weight of the dog [tex]W_f=28\ Pounds\ or\ 28\ lbs[/tex]
Every week dog lose 2 pounds
Total weight loss=42-28=14 lbs
So, no of weeks= [tex]\frac{14}{2}=7\ weeks[/tex]