!!!!!Please help I'm so stuck!!!!!

Suppose you drop a tennis ball from a height of 7ft. After the ball hits the floor, it rebounds to 80% of its previous height.

How many bounces will it take for the ball to rebound to a height of less than 1 foot?
A) 11
B) 9
C) 10
D) 12​

Please help Im so stuckSuppose you drop a tennis ball from a height of 7ft After the ball hits the floor it rebounds to 80 of its previous heightHow many bounce class=