When multiplying numbers in scientific notation, what do you do with the exponents?

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.

What layer of the atmosphere is directly above the troposphere?

Describe the interaction that occurs between two objects with the same electrical charge.