A quarterback takes the ball from the line of scrimmage, runs backwards for 12.0 yards, and then runs sideways parallel to the line of scrimmage for 11.5 yards. At this point, he throws a 30.0-yard forward pass straight downfield, perpendicular to the line of scrimmage. How far (in yards) is the football from its original location?

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.