How can we reduce our carbon footprint

Harvey kept a balloon with a volume of 348 milliliters at 25.0˚c inside a freezer for a night.  when he took it out, its new volume was 322 milliliters, but its pressure was the same.  if the final temperature of the balloon is the same as the freezer’s, what is the temperature of the freezer? the temperature of the freezer is  kelvins.

When the speed of the bottle is 2 m/s, the average maximum height of the beanbag is m.

The excretory system,need answers for all: )