[填空题]
A bouncy ball is dropped out of a second story:d:s +h8/bd f,f cfk9hrcm4nd cnu*,qj 5k sr9v;ding( lassroom window, 5 m off the ground. Every time the ball hits the ground it knjnrsi ;q(g* v59ud ,bounces
89 % of its previous height.
1.Find the height the ball reaches after the 11th bounce.
$u_{11}$≈ m.
2.Find the total distance travelled by the ball until it comes to rest.
total distance travelled≈ m.
