Find the exact circumferece of a circle with a given radius of 3 1/4 inches. a) 6.25 pi inches b) 6.5 pi inches c) 23.25 pi inches

Abouncy ball is released from a certain height. on the first bounce, it travels 32cm. with each subsequent bounce, it travels 9/10 the distance of the previous bounce. what is the total distance that the ball has traveled when it completes its 25th bounce?

Draw a scaled copy of the circle using a scale factor of 2

We just started the introduction into circles and i have no idea how to do this.