[填空题]
A bouncy ball is droppx0c6ef -za*lji b0 4jb 8ds)qued out1g8,rnr9lu xy6y b5m0nr dgbmu+e-z5 of a second story classroom window, 5m off the ground. Every time the r 5e yg,6xbl5nr9u0m bnyd+1 g8-ruzmball hits the ground it bounces 89% of its previous height.
1.Find the height the ball reaches after the 2nd bounce.
$u_2$≈ m.
3.Find the total distance the ball has travelled when it hits the ground for the 5th time.
The total distance travelled by the ball is approximately metres.
