Answer:
Step-by-step explanation:
When the balloon was filled with helium in the morning, it had a volume of 8.5 liters, and the temperature was 294 degrees kelvin.
By the time the party started in the afternoon, the temperature had gone up to 305 degrees kelvin. We want to know the new volume of the balloon.
To find that, we can use some math. When we do the math, we find out that the new volume of the balloon is about 8.19 liters. So, it got a little bit smaller when the temperature went up.