Question 1084223
a*r^(n-1) is height, with a=81, r=2/3 and n the number of times.
81*(2/3)^4=81*16/81=16 feet on the fifth time.
81 foot drop and hits 1 (81 feet)
bounces back up 54 feet (2/3 of 81)
drops 54 feet (189 feet distance) hits 2
rises 36 feet (225 feet distance) and falls 36 feet to hit 3 (261 feet distance)
rises 24 feet and falls 24 feet to hit 4 (309 feet distance)
rises 16 feet and falls 16 feet to hit 5 (341 feet)
rises 10 2/3 feet and falls 10 2/3 feet to hit 6 (362 1/3 feet).