The Seahawks stayed at home for a Week 3 NFC West duel with the St. Louis Rams.  In the first quarter, Seattle's kicker Olindo Mare made a 28-yard field goal.  The Seahawks continued their assault as QB Matt Hasselbeck completed a 10-yard TD pass to rookie WR Michael Bumpus and RB Julius Jones getting a 29-yard TD run.  In the second quarter, the Rams got on the board with former Seahawks kicker Olindo Mare getting a 43-yard field goal.  Seattle would reply with RB T. J. Duckett getting a 4-yard TD run.  St. Louis tried to rally as Brown kicked a 29-yard field goal, yet the Seahawks continued to increase their lead with Mare's 38-yard field goal. In the third quarter, the Rams tried to come back as QB Marc Bulger completed a 21-yard TD pass to WR Dane Looker.  In the fourth quarter, Seattle flew away as Duckett got a 1-yard TD run and Mare nailed a 38-yard field goal. With the win, the Seahawks entered their bye week at 1-2.
Question: How many yards longer was Olindo Mare's second field goal compared to his first?
Answer: 15