Jillian is trying to determine what helium tank pressure she needs to fill balloons for the student council dance. Find the unknown numbers in the table until you find the best answer to the question.
Which cylinder pressure will Jillian need if she plans to fill 90 balloons?
Tank Pressure and Balloon Quantity
Pressure in the helium Number of 9-inch
cylinder (psi)
balloons
100
30
150
?
200
?
250
?
300
?
150
O 200
0 250