After missing two weeks with cracked ribs, quarterback Matt Hasselbeck played for the first time since week two at San Francisco. Trying to snap a three-game losing streak, Hasselbeck started the offense off quickly, with Olindo Mare completing two field goals to put Seattle up by 6. The Seahawks defense also held its own, including a 4th-and-2 stop when the Jaguars threaten to score in the red zone. Later in the 2nd quarter, Hasselbeck would find wide receiver T. J. Houshmandzadeh for his first touchdown of the year, putting Seattle up 13-0. On their next offensive drive, Hasselbeck would connect with Nate Burleson for another touchdown, extending their lead to 20-0, which they took into halftime. Starting the third quarter on offense, David Garrard and the Jaguars tried to put some points on the board. However, all of their hopes were dashed when defensive end Cory Redding recovered a key fumble for 26 yards. Taking advantage of this, Hasselbeck again found Houshmandzadeh for his second touchdown to seal the game at 27-0. The Seahawks would later score again as Matt Hasselbeck threw his fourth touchdown again to Burleson, while defensive end Nick Reed scored from 79 yards out from a fumble recovery, putting the Seahawks up 41-0. With the win, the Seahawks improved to 2-3 for the season.
Question: How many points were the Seahawks ahead by at the end of the first half?
Answer: 20