The movement of the progress bar may be uneven because questions can be worth more or less (including zero) depending on your answer. The period I (in seconds) of a pendulum is given by T = 2x / (3, ) , where L stands for the length (in feet) of the pendulum. If a = 3.14, and the period is 12.56 seconds, what is the length? The length of the pendulum is feet. The solution is