PLEASE HELP ASAP GEOMETRY ILL GIVE BRAINLIEST

answer both questions please pne is multiple choice the other is not
first question is what is the equation of the circle graphed below? Thank you in advance

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.

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

Consider circle h with a 3 centimeter radius. if the length of minor arc what is the measure of zrst?