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​

Carli has 90 apps on her phone. braylen has half the amount of apps as theiss. if carli has three timesthe amount of apps as theiss,how many apps does braylen have? let b represent the number of braylen's apps and t represent the number of theiss's apps.