Vince's office recycled a total of 28 kilograms of paper over 4 weeks.
For one week he recycled
[tex]\frac{28}{4}=7\: kg[/tex]So, Vince's office recycled 7 kg of paper over 1 week.
To find the amount of recycled paper after 14 weeks, multiply it with the unit rate.
[tex]7\times14=84\: kg[/tex]Therefore, VInces office has 84 kg of paper recycled.