What is the y intercept in the following graph

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?

Common binomial factor of 6x(3x+7)+5(3x+7)

Me i’m stuck on all these questions besides the two bottom ones