Carl earns $ 3.25 per hour walking his neighbor's dog. He walks them 1/3 of an hour in the norning and 1/2 of an hour in the afternoon. Ten minutes is equal to 1/6 of an hour. How many minutes does Carl work dog walking each week?

1/3 x 60 = 20 mins
Carl walks the dog for 20 mins in the morning.

1/2 x 60 = 30 mins 
Carl walks the dog for 30 mins in the afternoon.

20 + 30 = 50 mins
Carl walks the dog for 50 mins a day.

50 x 7 = 350 mins
Carl walks the dog for 350 mins a week.

Answer: 350 mins.