Please help me! I am desperate! I need the answer fast!

Which statement best describes the polynomial

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.

What are the soultion(s) to the quadratic equation 40- x^2=0