an artist can paint 3 pet portraits a day. If the artist works at an art fair that lasts 14 days, how many pet portraits can the artist paint

The artist can paint 3 pet portraits a day, so in 14 days of the art fair, the artist can paint:

3 portraits/day x 14 days = 42 portraits.

Therefore, the artist can paint 42 pet portraits in 14 days.