Question 1075881
If the bounce is 25% less than the previous bounce, then it rises 75% of the amount it did on the previous bounce. So, after 12 bounces, we have:
h=15 x (.75)^12=15 x 0.031676352024078369140625 
h=0.48 inches in height after the 12th bounce. ☺☺☺☺