After a good rest on their bye week, the Colts stayed home for a game against the Panthers.  In the first quarter the Panthers jumped into an early lead as Olindo Mare kicked a 30-yard field goal for a leading score of 3-0.  They would make it 10-0 in the 2nd quarter when Cam Newton ran for a touchdown from 14 yards out.  The Colts got on the board when Donald Brown ran for a 17-yard touchdown coming within 3, 10-7.  Followed by an Adam Vinatieri field goal from 43 yards out tying the game at halftime 10-10.  In the 3rd quarter, the Panthers moved back into the lead as De'Angelo Williams ran for a touchdown from 25-yards out taking a 17-10 lead.  The Colts came within 4 points as Vinatieri kicked a 30-yard field goal for a 17-13 game.  In the 4th quarter, the Panthers moved ahead by double digits as Williams ran for a 2-yard touchdown for a 24-13 game.  Though the Colts managed to move within 5 points as Curtis Painter found Reggie Wayne on a 56-yard pass (with a failed 2-point conversion) for a 24-19 game.  The Panthers managed to wrap the game up when Mare kicked a 41-yard field goal taking the final score to 27-19.
Question: How many yards longer was the second field goal of the first half compared to the first?
Answer: 13