What is the value of the experssion (3//5•9/11)

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?

Which one ? is the answer and how to find this answer

Atriangle has side lengths of x, x+11, and 3x+5. what is the perimeter?