You have 400 mg of a radioisotope with a half-life of 5 minutes. How much will be left after 30 minutes?

You should ease the seat belt back slightly and slowly

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First of all you would die.   do not try this at home but back to the question.   there are six parts of the sun.   from the outside to the inside: corona, chromoshpere, photosphere, convective zone, radiative zone, and the core.   then use the dictionary or reliable sources such as wikipedia to find out what they do.   good luck.