Need to know how you found the answer and what the answer is

The graph shows the distance y, in inches, a pendulum moves to the right (positive displacement) and to the left (negative displacement), for a given number of seconds x. how many seconds are required for the pendulum to move from its resting position and return? enter your answer in the box.

The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg

The function models the number of accidents