The answer is 12 percent change
Volume of a cylinder of radius r and heigth h is

Here h is 15 cm and r is 6 cm.
Answer: 2000 tickets were sold
Step-by-step explanation:
8000 divided by 40 percent is 200
Step-by-step explanation:
7 1/2 = 7 + 1/2 = 14/2 + 1/2 = 15/2 = 7.5
check the attached picture.
:)