4.2540 centimeters are equal to how many inches?!

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.

Write a story that matches with the expression 42x-5 pls hurry

What is the absolute value of the complex number -4-sqrt2i