Please help I’ll give you guys brainiest.

Make sure to explain :)

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.

On a piece of paper graph f(x)=5•(0.4)^x

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?