The half-life of thorium-227 is 18.72 days. how many days are required for three-fourths of a given amount to decay?
i'm not quite sure how to set it up to even start working it? would be appreciated!

fire could start, buildings collapsing, and ash falling from the sky.

explanation:

this is because the buildings or plants could catch on fire and the buildings would most likely collapse. lastly ash would fall because all the burning would cause ash to fall from the sky.

hope this .