2 In a game of American football, a quarterback takes the ball from the
3 line of scrimmage, runs backward a distance of $10.0\U{yards}$, and
4 then runs sideways parallel to the line of scrimmage for
5 $15.0\U{yards}$. At this point, he throws a forward pass downfield
6 $50.0\U{yards}$ perpendicular to the line of scrimmage. What is the
7 magnitude of the football's resultant displacement?