Answer
1.21 seconds
Work Step by Step
We use the equation for the period of a pendulum to find:
$T = 2\pi\sqrt{\frac{L}{g}}=2\pi\sqrt{\frac{1.45 \ m}{9.81\ m/s^2}}=2.4156\ s$
The tick occurs every half period, which is $ \frac{2.4156\ s}{2} = \fbox{1.21 seconds}$
