i have this practice sheet and i am unsure how to solve yhis problem

Now, we know that in order to get 85% of the original height, we have to multiply it by 0.85
[tex]15\cdot0.85[/tex]Now, we can do this for every bounce, and calculate the final height by adding an extra 0.85
[tex]15\cdot0.85\cdot0.85\cdot0.85\cdot0.85\ldots[/tex]If we were to calculate the final height of the third bounce, we would have to use 0.85 three times, as following:
[tex]15\cdot0.85\cdot0.85\cdot0.85=9.2[/tex]Therefore, the ball would end up at 9.2 feet after the third bounce
Answer: Option A