1.5 meters equal how many cm

Itook a better photo of the question so y’all can see it i hope it’s a fine photo

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.

If 20% of a number is 35, what is 50% of that number?